111213104129 has 2 divisors, whose sum is σ = 111213104130. Its totient is φ = 111213104128.

The previous prime is 111213104113. The next prime is 111213104209. The reversal of 111213104129 is 921401312111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 95298777025 + 15914327104 = 308705^2 + 126152^2 .

It is a cyclic number.

It is not a de Polignac number, because 111213104129 - 2⁴ = 111213104113 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 111213104098 and 111213104107.

It is not a weakly prime, because it can be changed into another prime (111213104329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55606552064 + 55606552065.

It is an arithmetic number, because the mean of its divisors is an integer number (55606552065).

Almost surely, 2^111213104129 is an apocalyptic number.

It is an amenable number.

111213104129 is a deficient number, since it is larger than the sum of its proper divisors (1).

111213104129 is an equidigital number, since it uses as much as digits as its factorization.

111213104129 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 26.

The spelling of 111213104129 in words is "one hundred eleven billion, two hundred thirteen million, one hundred four thousand, one hundred twenty-nine".