202120012220 has 48 divisors (see below), whose sum is σ = 510618984960. Its totient is φ = 65651010624.

The previous prime is 202120012219. The next prime is 202120012223. The reversal of 202120012220 is 22210021202.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 202120012195 and 202120012204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202120012223) 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, 37989824 + ... + 37995143.

It is an arithmetic number, because the mean of its divisors is an integer number (10637895520).

Almost surely, 2^202120012220 is an apocalyptic number.

202120012220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202120012220 is an abundant number, since it is smaller than the sum of its proper divisors (308498972740).

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

202120012220 is a wasteful number, since it uses less digits than its factorization.

202120012220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75985002 (or 75985000 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 202120012220 its reverse (22210021202), we get a palindrome (224330033422).

The spelling of 202120012220 in words is "two hundred two billion, one hundred twenty million, twelve thousand, two hundred twenty".