21162650642611 has 2 divisors, whose sum is σ = 21162650642612. Its totient is φ = 21162650642610.

The previous prime is 21162650642603. The next prime is 21162650642621. The reversal of 21162650642611 is 11624605626112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21162650642611 - 2³ = 21162650642603 is a prime.

It is not a weakly prime, because it can be changed into another prime (21162650642621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10581325321305 + 10581325321306.

It is an arithmetic number, because the mean of its divisors is an integer number (10581325321306).

Almost surely, 2^{21162650642611} is an apocalyptic number.

21162650642611 is a deficient number, since it is larger than the sum of its proper divisors (1).

21162650642611 is an equidigital number, since it uses as much as digits as its factorization.

21162650642611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 207360, while the sum is 43.

The spelling of 21162650642611 in words is "twenty-one trillion, one hundred sixty-two billion, six hundred fifty million, six hundred forty-two thousand, six hundred eleven".