111011222131 has 2 divisors, whose sum is σ = 111011222132. Its totient is φ = 111011222130.

The previous prime is 111011222071. The next prime is 111011222141. The reversal of 111011222131 is 131222110111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111011222131 is a prime.

It is a super-2 number, since 2×111011222131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111011222141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55505611065 + 55505611066.

It is an arithmetic number, because the mean of its divisors is an integer number (55505611066).

Almost surely, 2^111011222131 is an apocalyptic number.

111011222131 is a deficient number, since it is larger than the sum of its proper divisors (1).

111011222131 is an equidigital number, since it uses as much as digits as its factorization.

111011222131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24, while the sum is 16.

Adding to 111011222131 its reverse (131222110111), we get a palindrome (242233332242).

The spelling of 111011222131 in words is "one hundred eleven billion, eleven million, two hundred twenty-two thousand, one hundred thirty-one".