21110031179 has 2 divisors, whose sum is σ = 21110031180. Its totient is φ = 21110031178.

The previous prime is 21110031167. The next prime is 21110031211. The reversal of 21110031179 is 97113001112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21110031179 - 2³² = 16815063883 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (21110031379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10555015589 + 10555015590.

It is an arithmetic number, because the mean of its divisors is an integer number (10555015590).

Almost surely, 2^21110031179 is an apocalyptic number.

21110031179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21110031179 is an equidigital number, since it uses as much as digits as its factorization.

21110031179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 378, while the sum is 26.

The spelling of 21110031179 in words is "twenty-one billion, one hundred ten million, thirty-one thousand, one hundred seventy-nine".