202101022020 has 48 divisors (see below), whose sum is σ = 579684889728. Its totient is φ = 52579127040.

The previous prime is 202101021973. The next prime is 202101022063. The reversal of 202101022020 is 20220101202.

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 = 202101021987 and 202101022005.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41074984 + ... + 41079903.

It is an arithmetic number, because the mean of its divisors is an integer number (12076768536).

Almost surely, 2^202101022020 is an apocalyptic number.

202101022020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202101022020 is an abundant number, since it is smaller than the sum of its proper divisors (377583867708).

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

202101022020 is a wasteful number, since it uses less digits than its factorization.

202101022020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82154940 (or 82154938 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

Adding to 202101022020 its reverse (20220101202), we get a palindrome (222321123222).

The spelling of 202101022020 in words is "two hundred two billion, one hundred one million, twenty-two thousand, twenty".