102021020022120 has 128 divisors (see below), whose sum is σ = 307675712044800. Its totient is φ = 27062571186176.

The previous prime is 102021020022109. The next prime is 102021020022133. The reversal of 102021020022120 is 21220020120201.

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

It is a self number, because there is not a number n which added to its sum of digits gives 102021020022120.

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, 18442732 + ... + 23327588.

It is an arithmetic number, because the mean of its divisors is an integer number (2403716500350).

Almost surely, 2^{102021020022120} is an apocalyptic number.

102021020022120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 102021020022120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (153837856022400).

102021020022120 is an abundant number, since it is smaller than the sum of its proper divisors (205654692022680).

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

102021020022120 is a wasteful number, since it uses less digits than its factorization.

102021020022120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4885787 (or 4885783 counting only the distinct ones).

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

Adding to 102021020022120 its reverse (21220020120201), we get a palindrome (123241040142321).

The spelling of 102021020022120 in words is "one hundred two trillion, twenty-one billion, twenty million, twenty-two thousand, one hundred twenty".