102021220120 has 16 divisors (see below), whose sum is σ = 229547745360. Its totient is φ = 40808488032.

The previous prime is 102021220117. The next prime is 102021220121. The reversal of 102021220120 is 21022120201.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 102021220120.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021220121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1275265212 + ... + 1275265291.

It is an arithmetic number, because the mean of its divisors is an integer number (14346734085).

Almost surely, 2^102021220120 is an apocalyptic number.

102021220120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021220120 is an abundant number, since it is smaller than the sum of its proper divisors (127526525240).

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

102021220120 is a wasteful number, since it uses less digits than its factorization.

102021220120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2550530514 (or 2550530510 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 102021220120 its reverse (21022120201), we get a palindrome (123043340321).

The spelling of 102021220120 in words is "one hundred two billion, twenty-one million, two hundred twenty thousand, one hundred twenty".