102120111100 has 54 divisors (see below), whose sum is σ = 257780349960. Its totient is φ = 35012607840.

The previous prime is 102120111011. The next prime is 102120111151. The reversal of 102120111100 is 1111021201.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10415520 + ... + 10425319.

Almost surely, 2^102120111100 is an apocalyptic number.

102120111100 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102120111100 is an abundant number, since it is smaller than the sum of its proper divisors (155660238860).

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

102120111100 is a wasteful number, since it uses less digits than its factorization.

102120111100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20840867 (or 20840853 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 10.

Adding to 102120111100 its reverse (1111021201), we get a palindrome (103231132301).

It can be divided in two parts, 1021201 and 11100, that added together give a palindrome (1032301).

The spelling of 102120111100 in words is "one hundred two billion, one hundred twenty million, one hundred eleven thousand, one hundred".