202121010120 has 64 divisors (see below), whose sum is σ = 612366661440. Its totient is φ = 53365280000.

The previous prime is 202121010061. The next prime is 202121010127. The reversal of 202121010120 is 21010121202.

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 = 202121010096 and 202121010105.

It is not an unprimeable number, because it can be changed into a prime (202121010127) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8326206 + ... + 8350445.

It is an arithmetic number, because the mean of its divisors is an integer number (9568229085).

Almost surely, 2^202121010120 is an apocalyptic number.

202121010120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202121010120 is an abundant number, since it is smaller than the sum of its proper divisors (410245651320).

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

202121010120 is a wasteful number, since it uses less digits than its factorization.

202121010120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16676766 (or 16676762 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 202121010120 its reverse (21010121202), we get a palindrome (223131131322).

The spelling of 202121010120 in words is "two hundred two billion, one hundred twenty-one million, ten thousand, one hundred twenty".