202101220220 has 24 divisors (see below), whose sum is σ = 424577235600. Its totient is φ = 80809121792.

The previous prime is 202101220183. The next prime is 202101220253. The reversal of 202101220220 is 22022101202.

It is a junction number, because it is equal to n+sod(n) for n = 202101220195 and 202101220204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1907525 + ... + 2010684.

It is an arithmetic number, because the mean of its divisors is an integer number (17690718150).

Almost surely, 2^202101220220 is an apocalyptic number.

202101220220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202101220220 is an abundant number, since it is smaller than the sum of its proper divisors (222476015380).

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

202101220220 is a wasteful number, since it uses less digits than its factorization.

202101220220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3920797 (or 3920795 counting only the distinct ones).

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

Adding to 202101220220 its reverse (22022101202), we get a palindrome (224123321422).

The spelling of 202101220220 in words is "two hundred two billion, one hundred one million, two hundred twenty thousand, two hundred twenty".