111111131202231 has 16 divisors (see below), whose sum is σ = 148973103563648. Its totient is φ = 73661658487200.

The previous prime is 111111131202133. The next prime is 111111131202283. The reversal of 111111131202231 is 132202131111111.

It is not a de Polignac number, because 111111131202231 - 2¹¹ = 111111131200183 is a prime.

It is a super-2 number, since 2×111111131202231² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 111111131202198 and 111111131202207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111111131202031) 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, 8207376 + ... + 17017146.

It is an arithmetic number, because the mean of its divisors is an integer number (9310818972728).

Almost surely, 2^{111111131202231} is an apocalyptic number.

111111131202231 is a deficient number, since it is larger than the sum of its proper divisors (37861972361417).

111111131202231 is a wasteful number, since it uses less digits than its factorization.

111111131202231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8833182.

The product of its (nonzero) digits is 72, while the sum is 21.

Adding to 111111131202231 its reverse (132202131111111), we get a palindrome (243313262313342).

The spelling of 111111131202231 in words is "one hundred eleven trillion, one hundred eleven billion, one hundred thirty-one million, two hundred two thousand, two hundred thirty-one".