1230002100 has 216 divisors, whose sum is σ = 4056372320. Its totient is φ = 311351040.

The previous prime is 1230002089. The next prime is 1230002101. The reversal of 1230002100 is 12000321.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1230002101) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1431471 + ... + 1432329.

Almost surely, 2^1230002100 is an apocalyptic number.

1230002100 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 1230002100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2028186160).

1230002100 is an abundant number, since it is smaller than the sum of its proper divisors (2826370220).

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

1230002100 is a wasteful number, since it uses less digits than its factorization.

1230002100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 959 (or 949 counting only the distinct ones).

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

The square root of 1230002100 is about 35071.3857724499. The cubic root of 1230002100 is about 1071.4418794538.

Adding to 1230002100 its reverse (12000321), we get a palindrome (1242002421).

The spelling of 1230002100 in words is "one billion, two hundred thirty million, two thousand, one hundred".