102121021221100 has 108 divisors (see below), whose sum is σ = 259812421107456. Its totient is φ = 34737229054080.

The previous prime is 102121021221049. The next prime is 102121021221101. The reversal of 102121021221100 is 1122120121201.

It is not an unprimeable number, because it can be changed into a prime (102121021221101) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 81428979 + ... + 82673578.

Almost surely, 2^{102121021221100} is an apocalyptic number.

102121021221100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102121021221100 is an abundant number, since it is smaller than the sum of its proper divisors (157691399886356).

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

102121021221100 is a wasteful number, since it uses less digits than its factorization.

102121021221100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164102712 (or 164102698 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 102121021221100 its reverse (1122120121201), we get a palindrome (103243141342301).

The spelling of 102121021221100 in words is "one hundred two trillion, one hundred twenty-one billion, twenty-one million, two hundred twenty-one thousand, one hundred".