202101200020 has 12 divisors (see below), whose sum is σ = 424412520084. Its totient is φ = 80840480000.

The previous prime is 202101199991. The next prime is 202101200023. The reversal of 202101200020 is 20002101202.

It can be written as a sum of positive squares in 2 ways, for example, as 144914216976 + 57186983044 = 380676^2 + 239138^2 .

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202101200023) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5052529981 + ... + 5052530020.

It is an arithmetic number, because the mean of its divisors is an integer number (35367710007).

Almost surely, 2^202101200020 is an apocalyptic number.

202101200020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202101200020 is an abundant number, since it is smaller than the sum of its proper divisors (222311320064).

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

202101200020 is a wasteful number, since it uses less digits than its factorization.

202101200020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10105060010 (or 10105060008 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 10.

Adding to 202101200020 its reverse (20002101202), we get a palindrome (222103301222).

The spelling of 202101200020 in words is "two hundred two billion, one hundred one million, two hundred thousand, twenty".