102021001221020 has 96 divisors (see below), whose sum is σ = 249474477909888. Its totient is φ = 34318069373952.

The previous prime is 102021001221011. The next prime is 102021001221067. The reversal of 102021001221020 is 20122100120201.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 102021001220986 and 102021001221004.

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, 851555762 + ... + 851675558.

It is an arithmetic number, because the mean of its divisors is an integer number (2598692478228).

Almost surely, 2^{102021001221020} is an apocalyptic number.

102021001221020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021001221020 is an abundant number, since it is smaller than the sum of its proper divisors (147453476688868).

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

102021001221020 is a wasteful number, since it uses less digits than its factorization.

102021001221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 234639 (or 234637 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 102021001221020 its reverse (20122100120201), we get a palindrome (122143101341221).

The spelling of 102021001221020 in words is "one hundred two trillion, twenty-one billion, one million, two hundred twenty-one thousand, twenty".