111211212000137 has 2 divisors, whose sum is σ = 111211212000138. Its totient is φ = 111211212000136.

The previous prime is 111211212000073. The next prime is 111211212000151. The reversal of 111211212000137 is 731000212112111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 92070376999561 + 19140835000576 = 9595331^2 + 4375024^2 .

It is a cyclic number.

It is not a de Polignac number, because 111211212000137 - 2⁶ = 111211212000073 is a prime.

It is not a weakly prime, because it can be changed into another prime (111211212000197) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605606000068 + 55605606000069.

It is an arithmetic number, because the mean of its divisors is an integer number (55605606000069).

Almost surely, 2^{111211212000137} is an apocalyptic number.

It is an amenable number.

111211212000137 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211212000137 is an equidigital number, since it uses as much as digits as its factorization.

111211212000137 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 168, while the sum is 23.

Adding to 111211212000137 its reverse (731000212112111), we get a palindrome (842211424112248).

The spelling of 111211212000137 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred twelve million, one hundred thirty-seven", and thus it is an aban number.