111031131321191 has 2 divisors, whose sum is σ = 111031131321192. Its totient is φ = 111031131321190.

The previous prime is 111031131321137. The next prime is 111031131321223. The reversal of 111031131321191 is 191123131130111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111031131321191 - 2¹⁸ = 111031131059047 is a prime.

It is a super-2 number, since 2×111031131321191² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111031131321101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55515565660595 + 55515565660596.

It is an arithmetic number, because the mean of its divisors is an integer number (55515565660596).

Almost surely, 2^{111031131321191} is an apocalyptic number.

111031131321191 is a deficient number, since it is larger than the sum of its proper divisors (1).

111031131321191 is an equidigital number, since it uses as much as digits as its factorization.

111031131321191 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 486, while the sum is 29.

The spelling of 111031131321191 in words is "one hundred eleven trillion, thirty-one billion, one hundred thirty-one million, three hundred twenty-one thousand, one hundred ninety-one".