111221111202131 has 16 divisors (see below), whose sum is σ = 136911457056000. Its totient is φ = 88214541071328.

The previous prime is 111221111202101. The next prime is 111221111202137. The reversal of 111221111202131 is 131202111122111.

It is not a de Polignac number, because 111221111202131 - 2⁶ = 111221111202067 is a prime.

It is a super-2 number, since 2×111221111202131² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111221111202137) 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, 9723819356 + ... + 9723830793.

It is an arithmetic number, because the mean of its divisors is an integer number (8556966066000).

Almost surely, 2^{111221111202131} is an apocalyptic number.

111221111202131 is a deficient number, since it is larger than the sum of its proper divisors (25690345853869).

111221111202131 is a wasteful number, since it uses less digits than its factorization.

111221111202131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19447650218.

The product of its (nonzero) digits is 48, while the sum is 20.

Adding to 111221111202131 its reverse (131202111122111), we get a palindrome (242423222324242).

The spelling of 111221111202131 in words is "one hundred eleven trillion, two hundred twenty-one billion, one hundred eleven million, two hundred two thousand, one hundred thirty-one".