21200120159 has 2 divisors, whose sum is σ = 21200120160. Its totient is φ = 21200120158.

The previous prime is 21200120087. The next prime is 21200120167. The reversal of 21200120159 is 95102100212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21200120159 - 2⁸ = 21200119903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21200122159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10600060079 + 10600060080.

It is an arithmetic number, because the mean of its divisors is an integer number (10600060080).

Almost surely, 2^21200120159 is an apocalyptic number.

21200120159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21200120159 is an equidigital number, since it uses as much as digits as its factorization.

21200120159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 360, while the sum is 23.

The spelling of 21200120159 in words is "twenty-one billion, two hundred million, one hundred twenty thousand, one hundred fifty-nine".