21022222159 has 2 divisors, whose sum is σ = 21022222160. Its totient is φ = 21022222158.

The previous prime is 21022222129. The next prime is 21022222171. The reversal of 21022222159 is 95122222012.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21022222159 - 2¹³ = 21022213967 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21022222129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10511111079 + 10511111080.

It is an arithmetic number, because the mean of its divisors is an integer number (10511111080).

Almost surely, 2^21022222159 is an apocalyptic number.

21022222159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21022222159 is an equidigital number, since it uses as much as digits as its factorization.

21022222159 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 28.

The spelling of 21022222159 in words is "twenty-one billion, twenty-two million, two hundred twenty-two thousand, one hundred fifty-nine".