102021131320 has 32 divisors (see below), whose sum is σ = 229576576320. Its totient is φ = 40803291520.

The previous prime is 102021131299. The next prime is 102021131327. The reversal of 102021131320 is 23131120201.

It is a super-2 number, since 2×102021131320² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 102021131294 and 102021131303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (102021131327) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167214 + ... + 481666.

It is an arithmetic number, because the mean of its divisors is an integer number (7174268010).

Almost surely, 2^102021131320 is an apocalyptic number.

102021131320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021131320 is an abundant number, since it is smaller than the sum of its proper divisors (127555445000).

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

102021131320 is a wasteful number, since it uses less digits than its factorization.

102021131320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322575 (or 322571 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 102021131320 its reverse (23131120201), we get a palindrome (125152251521).

The spelling of 102021131320 in words is "one hundred two billion, twenty-one million, one hundred thirty-one thousand, three hundred twenty".