111231120131 has 2 divisors, whose sum is σ = 111231120132. Its totient is φ = 111231120130.

The previous prime is 111231120097. The next prime is 111231120149. The reversal of 111231120131 is 131021132111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111231120131 - 2¹⁰ = 111231119107 is a prime.

It is a super-2 number, since 2×111231120131² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111231120151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55615560065 + 55615560066.

It is an arithmetic number, because the mean of its divisors is an integer number (55615560066).

Almost surely, 2^111231120131 is an apocalyptic number.

111231120131 is a deficient number, since it is larger than the sum of its proper divisors (1).

111231120131 is an equidigital number, since it uses as much as digits as its factorization.

111231120131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36, while the sum is 17.

Adding to 111231120131 its reverse (131021132111), we get a palindrome (242252252242).

The spelling of 111231120131 in words is "one hundred eleven billion, two hundred thirty-one million, one hundred twenty thousand, one hundred thirty-one".