111212111137 has 2 divisors, whose sum is σ = 111212111138. Its totient is φ = 111212111136.

The previous prime is 111212111123. The next prime is 111212111141. The reversal of 111212111137 is 731111212111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89089713441 + 22122397696 = 298479^2 + 148736^2 .

It is a cyclic number.

It is not a de Polignac number, because 111212111137 - 2²³ = 111203722529 is a prime.

It is not a weakly prime, because it can be changed into another prime (111212114137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606055568 + 55606055569.

It is an arithmetic number, because the mean of its divisors is an integer number (55606055569).

Almost surely, 2^111212111137 is an apocalyptic number.

It is an amenable number.

111212111137 is a deficient number, since it is larger than the sum of its proper divisors (1).

111212111137 is an equidigital number, since it uses as much as digits as its factorization.

111212111137 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 84, while the sum is 22.

Adding to 111212111137 its reverse (731111212111), we get a palindrome (842323323248).

The spelling of 111212111137 in words is "one hundred eleven billion, two hundred twelve million, one hundred eleven thousand, one hundred thirty-seven".