102111321900 has 144 divisors (see below), whose sum is σ = 355419196160. Its totient is φ = 22111315200.

The previous prime is 102111321877. The next prime is 102111321911. The reversal of 102111321900 is 9123111201.

It is a happy number.

It is a super-2 number, since 2×102111321900² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1239691 + ... + 1319490.

Almost surely, 2^102111321900 is an apocalyptic number.

102111321900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102111321900 is an abundant number, since it is smaller than the sum of its proper divisors (253307874260).

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

102111321900 is a wasteful number, since it uses less digits than its factorization.

102111321900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2559224 (or 2559217 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 21.

The spelling of 102111321900 in words is "one hundred two billion, one hundred eleven million, three hundred twenty-one thousand, nine hundred".