221313031100 has 72 divisors (see below), whose sum is σ = 572719676928. Its totient is φ = 72579672000.

The previous prime is 221313031033. The next prime is 221313031103. The reversal of 221313031100 is 1130313122.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221313031103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6856976 + ... + 6889175.

Almost surely, 2^221313031100 is an apocalyptic number.

221313031100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221313031100 is an abundant number, since it is smaller than the sum of its proper divisors (351406645828).

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

221313031100 is a wasteful number, since it uses less digits than its factorization.

221313031100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13746195 (or 13746188 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 17.

Adding to 221313031100 its reverse (1130313122), we get a palindrome (222443344222).

The spelling of 221313031100 in words is "two hundred twenty-one billion, three hundred thirteen million, thirty-one thousand, one hundred".