220131749124 has 81 divisors (see below), whose sum is σ = 647350116231. Its totient is φ = 62889155280.

The previous prime is 220131749111. The next prime is 220131749143. The reversal of 220131749124 is 421947131022.

The square root of 220131749124 is 469182.

It is a perfect power (a square), and thus also a powerful number.

220131749124 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 19700059 + ... + 19711229.

Almost surely, 2^220131749124 is an apocalyptic number.

220131749124 is the 469182-nd square number.

It is an amenable number.

220131749124 is an abundant number, since it is smaller than the sum of its proper divisors (427218367107).

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

220131749124 is an equidigital number, since it uses as much as digits as its factorization.

220131749124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22366 (or 11183 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

Multiplying 220131749124 by its sum of digits (36), we get a square (7924742968464 = 2815092²).

220131749124 divided by its sum of digits (36) gives a square (6114770809 = 78197²).

The spelling of 220131749124 in words is "two hundred twenty billion, one hundred thirty-one million, seven hundred forty-nine thousand, one hundred twenty-four".