111512010011531 has 2 divisors, whose sum is σ = 111512010011532. Its totient is φ = 111512010011530.

The previous prime is 111512010011491. The next prime is 111512010011569. The reversal of 111512010011531 is 135110010215111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111512010011531 - 2¹⁴ = 111512009995147 is a prime.

It is a super-2 number, since 2×111512010011531² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 111512010011497 and 111512010011506.

It is not a weakly prime, because it can be changed into another prime (111512010013531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55756005005765 + 55756005005766.

It is an arithmetic number, because the mean of its divisors is an integer number (55756005005766).

Almost surely, 2^{111512010011531} is an apocalyptic number.

111512010011531 is a deficient number, since it is larger than the sum of its proper divisors (1).

111512010011531 is an equidigital number, since it uses as much as digits as its factorization.

111512010011531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 23.

Adding to 111512010011531 its reverse (135110010215111), we get a palindrome (246622020226642).

The spelling of 111512010011531 in words is "one hundred eleven trillion, five hundred twelve billion, ten million, eleven thousand, five hundred thirty-one".