111206840137 has 2 divisors, whose sum is σ = 111206840138. Its totient is φ = 111206840136.

The previous prime is 111206840131. The next prime is 111206840167. The reversal of 111206840137 is 731048602111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 91249909776 + 19956930361 = 302076^2 + 141269^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-111206840137 is a prime.

It is a super-2 number, since 2×111206840137² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (111206840131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55603420068 + 55603420069.

It is an arithmetic number, because the mean of its divisors is an integer number (55603420069).

Almost surely, 2^111206840137 is an apocalyptic number.

It is an amenable number.

111206840137 is a deficient number, since it is larger than the sum of its proper divisors (1).

111206840137 is an equidigital number, since it uses as much as digits as its factorization.

111206840137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 34.

The spelling of 111206840137 in words is "one hundred eleven billion, two hundred six million, eight hundred forty thousand, one hundred thirty-seven".