202221220 has 12 divisors (see below), whose sum is σ = 424664604. Its totient is φ = 80888480.

The previous prime is 202221203. The next prime is 202221233. The reversal of 202221220 is 22122202.

It can be written as a sum of positive squares in 2 ways, for example, as 76422564 + 125798656 = 8742^2 + 11216^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 202221220.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5055511 + ... + 5055550.

It is an arithmetic number, because the mean of its divisors is an integer number (35388717).

Almost surely, 2^202221220 is an apocalyptic number.

202221220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202221220 is an abundant number, since it is smaller than the sum of its proper divisors (222443384).

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

202221220 is a wasteful number, since it uses less digits than its factorization.

202221220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10111070 (or 10111068 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 13.

The square root of 202221220 is about 14220.4507664138. The cubic root of 202221220 is about 586.9605441954.

Adding to 202221220 its reverse (22122202), we get a palindrome (224343422).

The spelling of 202221220 in words is "two hundred two million, two hundred twenty-one thousand, two hundred twenty".