102121200021100 has 72 divisors (see below), whose sum is σ = 238651670659248. Its totient is φ = 37705928736000.

The previous prime is 102121200021091. The next prime is 102121200021101. The reversal of 102121200021100 is 1120002121201.

It is a Harshad number since it is a multiple of its sum of digits (13).

It is not an unprimeable number, because it can be changed into a prime (102121200021101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162963375 + ... + 163588825.

It is an arithmetic number, because the mean of its divisors is an integer number (3314606536934).

Almost surely, 2^{102121200021100} is an apocalyptic number.

102121200021100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102121200021100 is an abundant number, since it is smaller than the sum of its proper divisors (136530470638148).

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

102121200021100 is a wasteful number, since it uses less digits than its factorization.

102121200021100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 751075 (or 751068 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 102121200021100 its reverse (1120002121201), we get a palindrome (103241202142301).

The spelling of 102121200021100 in words is "one hundred two trillion, one hundred twenty-one billion, two hundred million, twenty-one thousand, one hundred".