102120111020 has 12 divisors (see below), whose sum is σ = 214452233184. Its totient is φ = 40848044400.

The previous prime is 102120111011. The next prime is 102120111151. The reversal of 102120111020 is 20111021201.

It is a junction number, because it is equal to n+sod(n) for n = 102120110992 and 102120111010.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2553002756 + ... + 2553002795.

It is an arithmetic number, because the mean of its divisors is an integer number (17871019432).

Almost surely, 2^102120111020 is an apocalyptic number.

102120111020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102120111020 is an abundant number, since it is smaller than the sum of its proper divisors (112332122164).

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

102120111020 is a wasteful number, since it uses less digits than its factorization.

102120111020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5106005560 (or 5106005558 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 102120111020 its reverse (20111021201), we get a palindrome (122231132221).

The spelling of 102120111020 in words is "one hundred two billion, one hundred twenty million, one hundred eleven thousand, twenty".