202313121220 has 24 divisors (see below), whose sum is σ = 485551491264. Its totient is φ = 69364498656.

The previous prime is 202313121217. The next prime is 202313121233. The reversal of 202313121220 is 22121313202.

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, 722546722 + ... + 722547001.

It is an arithmetic number, because the mean of its divisors is an integer number (20231312136).

Almost surely, 2^202313121220 is an apocalyptic number.

202313121220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202313121220 is an abundant number, since it is smaller than the sum of its proper divisors (283238370044).

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

202313121220 is a wasteful number, since it uses less digits than its factorization.

202313121220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1445093739 (or 1445093737 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

Adding to 202313121220 its reverse (22121313202), we get a palindrome (224434434422).

The spelling of 202313121220 in words is "two hundred two billion, three hundred thirteen million, one hundred twenty-one thousand, two hundred twenty".