111211211122139 has 2 divisors, whose sum is σ = 111211211122140. Its totient is φ = 111211211122138.

The previous prime is 111211211122013. The next prime is 111211211122163. The reversal of 111211211122139 is 931221112112111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111211211122139 - 2⁸ = 111211211121883 is a prime.

It is not a weakly prime, because it can be changed into another prime (111211211122199) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55605605561069 + 55605605561070.

It is an arithmetic number, because the mean of its divisors is an integer number (55605605561070).

Almost surely, 2^{111211211122139} is an apocalyptic number.

111211211122139 is a deficient number, since it is larger than the sum of its proper divisors (1).

111211211122139 is an equidigital number, since it uses as much as digits as its factorization.

111211211122139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 432, while the sum is 29.

The spelling of 111211211122139 in words is "one hundred eleven trillion, two hundred eleven billion, two hundred eleven million, one hundred twenty-two thousand, one hundred thirty-nine".