102111222122210 has 48 divisors (see below), whose sum is σ = 213832053741240. Its totient is φ = 35005688040960.

The previous prime is 102111222122149. The next prime is 102111222122237. The reversal of 102111222122210 is 12221222111201.

It can be written as a sum of positive squares in 4 ways, for example, as 91999922372281 + 10111299749929 = 9591659^2 + 3179827^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7094645 + ... + 15954824.

Almost surely, 2^{102111222122210} is an apocalyptic number.

102111222122210 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

102111222122210 is an abundant number, since it is smaller than the sum of its proper divisors (111720831619030).

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

102111222122210 is a wasteful number, since it uses less digits than its factorization.

102111222122210 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23058531 (or 23058524 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 20.

Adding to 102111222122210 its reverse (12221222111201), we get a palindrome (114332444233411).

The spelling of 102111222122210 in words is "one hundred two trillion, one hundred eleven billion, two hundred twenty-two million, one hundred twenty-two thousand, two hundred ten".