21221313332159 has 2 divisors, whose sum is σ = 21221313332160. Its totient is φ = 21221313332158.

The previous prime is 21221313332053. The next prime is 21221313332231. The reversal of 21221313332159 is 95123331312212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21221313332159 - 2¹² = 21221313328063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21221313332959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610656666079 + 10610656666080.

It is an arithmetic number, because the mean of its divisors is an integer number (10610656666080).

Almost surely, 2^{21221313332159} is an apocalyptic number.

21221313332159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21221313332159 is an equidigital number, since it uses as much as digits as its factorization.

21221313332159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 58320, while the sum is 38.

The spelling of 21221313332159 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred thirteen million, three hundred thirty-two thousand, one hundred fifty-nine".