202122212020 has 24 divisors (see below), whose sum is σ = 428659190568. Its totient is φ = 80048400000.

The previous prime is 202122211961. The next prime is 202122212069. The reversal of 202122212020 is 20212221202.

It can be written as a sum of positive squares in 4 ways, for example, as 105055070884 + 97067141136 = 324122^2 + 311556^2 .

It is a junction number, because it is equal to n+sod(n) for n = 202122211985 and 202122212003.

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, 50028231 + ... + 50032270.

It is an arithmetic number, because the mean of its divisors is an integer number (17860799607).

Almost surely, 2^202122212020 is an apocalyptic number.

202122212020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202122212020 is an abundant number, since it is smaller than the sum of its proper divisors (226536978548).

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

202122212020 is a wasteful number, since it uses less digits than its factorization.

202122212020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100060611 (or 100060609 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 202122212020 its reverse (20212221202), we get a palindrome (222334433222).

It can be divided in two parts, 20 and 2122212020, that multiplied together give a square (42444240400 = 206020²).

The spelling of 202122212020 in words is "two hundred two billion, one hundred twenty-two million, two hundred twelve thousand, twenty".