123020132100 has 36 divisors (see below), whose sum is σ = 355938249744. Its totient is φ = 32805368480.

The previous prime is 123020132099. The next prime is 123020132101. The reversal of 123020132100 is 1231020321.

It is an interprime number because it is at equal distance from previous prime (123020132099) and next prime (123020132101).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 123020132100.

It is not an unprimeable number, because it can be changed into a prime (123020132101) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 205033254 + ... + 205033853.

It is an arithmetic number, because the mean of its divisors is an integer number (9887173604).

Almost surely, 2^123020132100 is an apocalyptic number.

123020132100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123020132100 is an abundant number, since it is smaller than the sum of its proper divisors (232918117644).

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

123020132100 is a wasteful number, since it uses less digits than its factorization.

123020132100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410067124 (or 410067117 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 15.

Adding to 123020132100 its reverse (1231020321), we get a palindrome (124251152421).

The spelling of 123020132100 in words is "one hundred twenty-three billion, twenty million, one hundred thirty-two thousand, one hundred".