111431100409 has 2 divisors, whose sum is σ = 111431100410. Its totient is φ = 111431100408.

The previous prime is 111431100229. The next prime is 111431100481. The reversal of 111431100409 is 904001134111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 94831354809 + 16599745600 = 307947^2 + 128840^2 .

It is a cyclic number.

It is not a de Polignac number, because 111431100409 - 2²⁵ = 111397545977 is a prime.

It is not a weakly prime, because it can be changed into another prime (111431100709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55715550204 + 55715550205.

It is an arithmetic number, because the mean of its divisors is an integer number (55715550205).

Almost surely, 2^111431100409 is an apocalyptic number.

It is an amenable number.

111431100409 is a deficient number, since it is larger than the sum of its proper divisors (1).

111431100409 is an equidigital number, since it uses as much as digits as its factorization.

111431100409 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 25.

The spelling of 111431100409 in words is "one hundred eleven billion, four hundred thirty-one million, one hundred thousand, four hundred nine".