21610606051 has 2 divisors, whose sum is σ = 21610606052. Its totient is φ = 21610606050.

The previous prime is 21610605983. The next prime is 21610606117. The reversal of 21610606051 is 15060601612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21610606051 - 2⁷ = 21610605923 is a prime.

It is not a weakly prime, because it can be changed into another prime (21610606351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10805303025 + 10805303026.

It is an arithmetic number, because the mean of its divisors is an integer number (10805303026).

Almost surely, 2^21610606051 is an apocalyptic number.

21610606051 is a deficient number, since it is larger than the sum of its proper divisors (1).

21610606051 is an equidigital number, since it uses as much as digits as its factorization.

21610606051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2160, while the sum is 28.

The spelling of 21610606051 in words is "twenty-one billion, six hundred ten million, six hundred six thousand, fifty-one".