1223100000 has 360 divisors, whose sum is σ = 4525866576. Its totient is φ = 324000000.

The previous prime is 1223099993. The next prime is 1223100017. The reversal of 1223100000 is 13221.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (360).

It is a super-2 number, since 2×1223100000² = 2991947220000000000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 59 ways as a sum of consecutive naturals, for example, 8099925 + ... + 8100075.

Almost surely, 2^1223100000 is an apocalyptic number.

1223100000 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 1223100000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2262933288).

1223100000 is an abundant number, since it is smaller than the sum of its proper divisors (3302766576).

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

1223100000 is an frugal number, since it uses more digits than its factorization.

1223100000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198 (or 161 counting only the distinct ones).

The product of its (nonzero) digits is 12, while the sum is 9.

The square root of 1223100000 is about 34972.8466099058. The cubic root of 1223100000 is about 1069.4340035087.

Adding to 1223100000 its reverse (13221), we get a palindrome (1223113221).

The spelling of 1223100000 in words is "one billion, two hundred twenty-three million, one hundred thousand".