102110111020 has 12 divisors (see below), whose sum is σ = 214431233184. Its totient is φ = 40844044400.

The previous prime is 102110111017. The next prime is 102110111039. The reversal of 102110111020 is 20111011201.

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

It is a junction number, because it is equal to n+sod(n) for n = 102110110988 and 102110111006.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 2552752756 + ... + 2552752795.

It is an arithmetic number, because the mean of its divisors is an integer number (17869269432).

Almost surely, 2^102110111020 is an apocalyptic number.

102110111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102110111020 is an abundant number, since it is smaller than the sum of its proper divisors (112321122164).

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

102110111020 is a wasteful number, since it uses less digits than its factorization.

102110111020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5105505560 (or 5105505558 counting only the distinct ones).

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

Adding to 102110111020 its reverse (20111011201), we get a palindrome (122221122221).

The spelling of 102110111020 in words is "one hundred two billion, one hundred ten million, one hundred eleven thousand, twenty".