102021111100020 has 96 divisors (see below), whose sum is σ = 326471052902400. Its totient is φ = 23318861295744.

The previous prime is 102021111100009. The next prime is 102021111100087. The reversal of 102021111100020 is 20001111120201.

It is a super-2 number, since 2×102021111100020² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 102021111099969 and 102021111100005.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 39470151 + ... + 41975409.

It is an arithmetic number, because the mean of its divisors is an integer number (3400740134400).

Almost surely, 2^{102021111100020} is an apocalyptic number.

102021111100020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021111100020 is an abundant number, since it is smaller than the sum of its proper divisors (224449941802380).

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

102021111100020 is a wasteful number, since it uses less digits than its factorization.

102021111100020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2602237 (or 2602235 counting only the distinct ones).

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 102021111100020 its reverse (20001111120201), we get a palindrome (122022222220221).

The spelling of 102021111100020 in words is "one hundred two trillion, twenty-one billion, one hundred eleven million, one hundred thousand, twenty".