220111221231 has 128 divisors (see below), whose sum is σ = 380016230400. Its totient is φ = 124584324480.

The previous prime is 220111221167. The next prime is 220111221251. The reversal of 220111221231 is 132122111022.

220111221231 is a `hidden beast` number, since 2 + 201 + 11 + 221 + 231 = 666.

It is not a de Polignac number, because 220111221231 - 2⁶ = 220111221167 is a prime.

It is a super-2 number, since 2×220111221231² (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 (220111221251) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 265513725 + ... + 265514553.

It is an arithmetic number, because the mean of its divisors is an integer number (2968876800).

Almost surely, 2^220111221231 is an apocalyptic number.

220111221231 is a deficient number, since it is larger than the sum of its proper divisors (159905009169).

220111221231 is a wasteful number, since it uses less digits than its factorization.

220111221231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746 (or 1740 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 18.

Adding to 220111221231 its reverse (132122111022), we get a palindrome (352233332253).

The spelling of 220111221231 in words is "two hundred twenty billion, one hundred eleven million, two hundred twenty-one thousand, two hundred thirty-one".