102021220021020 has 96 divisors (see below), whose sum is σ = 285859224840000. Its totient is φ = 27186633676800.

The previous prime is 102021220021001. The next prime is 102021220021247. The reversal of 102021220021020 is 20120022120201.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 792339606 + ... + 792468354.

It is an arithmetic number, because the mean of its divisors is an integer number (2977700258750).

Almost surely, 2^{102021220021020} is an apocalyptic number.

102021220021020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

102021220021020 is an abundant number, since it is smaller than the sum of its proper divisors (183838004818980).

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

102021220021020 is a wasteful number, since it uses less digits than its factorization.

102021220021020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137895 (or 137893 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 102021220021020 its reverse (20120022120201), we get a palindrome (122141242141221).

The spelling of 102021220021020 in words is "one hundred two trillion, twenty-one billion, two hundred twenty million, twenty-one thousand, twenty".