1223003100 has 144 divisors (see below), whose sum is σ = 3873252096. Its totient is φ = 295488000.

The previous prime is 1223003099. The next prime is 1223003101. The reversal of 1223003100 is 13003221.

It is a happy number.

1223003100 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (1223003099) and next prime (1223003101).

It is a super-2 number, since 2×1223003100² = 2991473165219220000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1223003101) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1606720 + ... + 1607480.

It is an arithmetic number, because the mean of its divisors is an integer number (26897584).

Almost surely, 2^1223003100 is an apocalyptic number.

1223003100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223003100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1936626048).

1223003100 is an abundant number, since it is smaller than the sum of its proper divisors (2650248996).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1223003100 is a wasteful number, since it uses less digits than its factorization.

1223003100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1276 (or 1269 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 12.

The square root of 1223003100 is about 34971.4612219736. The cubic root of 1223003100 is about 1069.4057608216.

Adding to 1223003100 its reverse (13003221), we get a palindrome (1236006321).

The spelling of 1223003100 in words is "one billion, two hundred twenty-three million, three thousand, one hundred".