102111212120 has 32 divisors (see below), whose sum is σ = 237672651600. Its totient is φ = 39436053888.

The previous prime is 102111212111. The next prime is 102111212123. The reversal of 102111212120 is 21212111201.

It is a junction number, because it is equal to n+sod(n) for n = 102111212095 and 102111212104.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102111212123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 44012294 + ... + 44014613.

Almost surely, 2^102111212120 is an apocalyptic number.

102111212120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102111212120 is an abundant number, since it is smaller than the sum of its proper divisors (135561439480).

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

102111212120 is a wasteful number, since it uses less digits than its factorization.

102111212120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88026947 (or 88026943 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 102111212120 its reverse (21212111201), we get a palindrome (123323323321).

The spelling of 102111212120 in words is "one hundred two billion, one hundred eleven million, two hundred twelve thousand, one hundred twenty".