111221323131 has 16 divisors (see below), whose sum is σ = 161482867200. Its totient is φ = 67822802208.

The previous prime is 111221323097. The next prime is 111221323151. The reversal of 111221323131 is 131323122111.

It is not a de Polignac number, because 111221323131 - 2⁶ = 111221323067 is a prime.

It is a super-2 number, since 2×111221323131² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111221323098 and 111221323107.

It is not an unprimeable number, because it can be changed into a prime (111221323151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33640611 + ... + 33643916.

It is an arithmetic number, because the mean of its divisors is an integer number (10092679200).

Almost surely, 2^111221323131 is an apocalyptic number.

111221323131 is a deficient number, since it is larger than the sum of its proper divisors (50261544069).

111221323131 is a wasteful number, since it uses less digits than its factorization.

111221323131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67284578.

The product of its digits is 216, while the sum is 21.

Adding to 111221323131 its reverse (131323122111), we get a palindrome (242544445242).

The spelling of 111221323131 in words is "one hundred eleven billion, two hundred twenty-one million, three hundred twenty-three thousand, one hundred thirty-one".