21290179111 has 2 divisors, whose sum is σ = 21290179112. Its totient is φ = 21290179110.

The previous prime is 21290179073. The next prime is 21290179247. The reversal of 21290179111 is 11197109212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21290179111 - 2⁷ = 21290178983 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21290176111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10645089555 + 10645089556.

It is an arithmetic number, because the mean of its divisors is an integer number (10645089556).

Almost surely, 2^21290179111 is an apocalyptic number.

21290179111 is a deficient number, since it is larger than the sum of its proper divisors (1).

21290179111 is an equidigital number, since it uses as much as digits as its factorization.

21290179111 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2268, while the sum is 34.

The spelling of 21290179111 in words is "twenty-one billion, two hundred ninety million, one hundred seventy-nine thousand, one hundred eleven".