202110221020 has 48 divisors (see below), whose sum is σ = 427382645760. Its totient is φ = 80283189056.

The previous prime is 202110221011. The next prime is 202110221039. The reversal of 202110221020 is 20122011202.

It is a happy number.

It is a congruent number.

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, 2621949 + ... + 2697931.

It is an arithmetic number, because the mean of its divisors is an integer number (8903805120).

Almost surely, 2^202110221020 is an apocalyptic number.

202110221020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202110221020 is an abundant number, since it is smaller than the sum of its proper divisors (225272424740).

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

202110221020 is a wasteful number, since it uses less digits than its factorization.

202110221020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76914 (or 76912 counting only the distinct ones).

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

Adding to 202110221020 its reverse (20122011202), we get a palindrome (222232232222).

The spelling of 202110221020 in words is "two hundred two billion, one hundred ten million, two hundred twenty-one thousand, twenty".