111231309785579 has 2 divisors, whose sum is σ = 111231309785580. Its totient is φ = 111231309785578.

The previous prime is 111231309785483. The next prime is 111231309785653. The reversal of 111231309785579 is 975587903132111.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 111231309785579 - 2³⁶ = 111162590308843 is a prime.

It is not a weakly prime, because it can be changed into another prime (111231309785779) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55615654892789 + 55615654892790.

It is an arithmetic number, because the mean of its divisors is an integer number (55615654892790).

Almost surely, 2^{111231309785579} is an apocalyptic number.

111231309785579 is a deficient number, since it is larger than the sum of its proper divisors (1).

111231309785579 is an equidigital number, since it uses as much as digits as its factorization.

111231309785579 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14288400, while the sum is 62.

The spelling of 111231309785579 in words is "one hundred eleven trillion, two hundred thirty-one billion, three hundred nine million, seven hundred eighty-five thousand, five hundred seventy-nine".