21150622221679 has 2 divisors, whose sum is σ = 21150622221680. Its totient is φ = 21150622221678.

The previous prime is 21150622221667. The next prime is 21150622221719. The reversal of 21150622221679 is 97612222605112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21150622221679 - 2⁷ = 21150622221551 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21150622221629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10575311110839 + 10575311110840.

It is an arithmetic number, because the mean of its divisors is an integer number (10575311110840).

Almost surely, 2^{21150622221679} is an apocalyptic number.

21150622221679 is a deficient number, since it is larger than the sum of its proper divisors (1).

21150622221679 is an equidigital number, since it uses as much as digits as its factorization.

21150622221679 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 362880, while the sum is 46.

The spelling of 21150622221679 in words is "twenty-one trillion, one hundred fifty billion, six hundred twenty-two million, two hundred twenty-one thousand, six hundred seventy-nine".