221112211323231 has 24 divisors (see below), whose sum is σ = 320225418240000. Its totient is φ = 147020408610192.

The previous prime is 221112211323137. The next prime is 221112211323247. The reversal of 221112211323231 is 132323112211122.

221112211323231 is a `hidden beast` number, since 2 + 2 + 111 + 221 + 1 + 3 + 2 + 323 + 1 = 666.

It is not a de Polignac number, because 221112211323231 - 2¹⁵ = 221112211290463 is a prime.

It is a super-2 number, since 2×221112211323231² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221112211323195 and 221112211323204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221112211323331) 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, 14136511 + ... + 25339008.

It is an arithmetic number, because the mean of its divisors is an integer number (13342725760000).

Almost surely, 2^{221112211323231} is an apocalyptic number.

221112211323231 is a deficient number, since it is larger than the sum of its proper divisors (99113206916769).

221112211323231 is a wasteful number, since it uses less digits than its factorization.

221112211323231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39477163 (or 39477160 counting only the distinct ones).

The product of its digits is 1728, while the sum is 27.

Adding to 221112211323231 its reverse (132323112211122), we get a palindrome (353435323534353).

The spelling of 221112211323231 in words is "two hundred twenty-one trillion, one hundred twelve billion, two hundred eleven million, three hundred twenty-three thousand, two hundred thirty-one".