202122021100 has 18 divisors (see below), whose sum is σ = 438604786004. Its totient is φ = 80848808400.

The previous prime is 202122021091. The next prime is 202122021193. The reversal of 202122021100 is 1120221202.

It is a happy number.

202122021100 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×202122021100² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1010610006 + ... + 1010610205.

Almost surely, 2^202122021100 is an apocalyptic number.

202122021100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202122021100 is an abundant number, since it is smaller than the sum of its proper divisors (236482764904).

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

202122021100 is a wasteful number, since it uses less digits than its factorization.

202122021100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2021220225 (or 2021220218 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 202122021100 its reverse (1120221202), we get a palindrome (203242242302).

The spelling of 202122021100 in words is "two hundred two billion, one hundred twenty-two million, twenty-one thousand, one hundred".