220221144231 has 16 divisors (see below), whose sum is σ = 323920788480. Its totient is φ = 131967725120.

The previous prime is 220221144197. The next prime is 220221144233. The reversal of 220221144231 is 132441122022.

It is not a de Polignac number, because 220221144231 - 2¹⁹ = 220220619943 is a prime.

It is a super-2 number, since 2×220221144231² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220221144233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 37487895 + ... + 37493768.

It is an arithmetic number, because the mean of its divisors is an integer number (20245049280).

Almost surely, 2^220221144231 is an apocalyptic number.

220221144231 is a deficient number, since it is larger than the sum of its proper divisors (103699644249).

220221144231 is a wasteful number, since it uses less digits than its factorization.

220221144231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74981766.

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 220221144231 its reverse (132441122022), we get a palindrome (352662266253).

The spelling of 220221144231 in words is "two hundred twenty billion, two hundred twenty-one million, one hundred forty-four thousand, two hundred thirty-one".