202020112221 has 32 divisors (see below), whose sum is σ = 293111094528. Its totient is φ = 123248471040.

The previous prime is 202020112219. The next prime is 202020112237. The reversal of 202020112221 is 122211020202.

It is not a de Polignac number, because 202020112221 - 2¹ = 202020112219 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 202020112221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202020112201) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2815831 + ... + 2886683.

It is an arithmetic number, because the mean of its divisors is an integer number (9159721704).

Almost surely, 2^202020112221 is an apocalyptic number.

It is an amenable number.

202020112221 is a deficient number, since it is larger than the sum of its proper divisors (91090982307).

202020112221 is a wasteful number, since it uses less digits than its factorization.

202020112221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72421.

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 202020112221 its reverse (122211020202), we get a palindrome (324231132423).

The spelling of 202020112221 in words is "two hundred two billion, twenty million, one hundred twelve thousand, two hundred twenty-one".