220131321111 has 40 divisors (see below), whose sum is σ = 357784414064. Its totient is φ = 134068815360.

The previous prime is 220131321089. The next prime is 220131321121. The reversal of 220131321111 is 111123131022.

220131321111 is a `hidden beast` number, since 2 + 201 + 31 + 321 + 111 = 666.

It is not a de Polignac number, because 220131321111 - 2¹⁵ = 220131288343 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (220131321121) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 975445 + ... + 1179726.

Almost surely, 2^220131321111 is an apocalyptic number.

220131321111 is a deficient number, since it is larger than the sum of its proper divisors (137653092953).

220131321111 is a wasteful number, since it uses less digits than its factorization.

220131321111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2155293 (or 2155284 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 220131321111 its reverse (111123131022), we get a palindrome (331254452133).

The spelling of 220131321111 in words is "two hundred twenty billion, one hundred thirty-one million, three hundred twenty-one thousand, one hundred eleven".