220131223100 has 18 divisors (see below), whose sum is σ = 477684754344. Its totient is φ = 88052489200.

The previous prime is 220131223027. The next prime is 220131223133. The reversal of 220131223100 is 1322131022.

It is a super-2 number, since 2×220131223100² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1100656016 + ... + 1100656215.

It is an arithmetic number, because the mean of its divisors is an integer number (26538041908).

Almost surely, 2^220131223100 is an apocalyptic number.

220131223100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

220131223100 is an abundant number, since it is smaller than the sum of its proper divisors (257553531244).

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

220131223100 is a wasteful number, since it uses less digits than its factorization.

220131223100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2201312245 (or 2201312238 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 220131223100 its reverse (1322131022), we get a palindrome (221453354122).

The spelling of 220131223100 in words is "two hundred twenty billion, one hundred thirty-one million, two hundred twenty-three thousand, one hundred".