21220153312159 has 2 divisors, whose sum is σ = 21220153312160. Its totient is φ = 21220153312158.

The previous prime is 21220153312151. The next prime is 21220153312181. The reversal of 21220153312159 is 95121335102212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21220153312159 - 2³ = 21220153312151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21220153312151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10610076656079 + 10610076656080.

It is an arithmetic number, because the mean of its divisors is an integer number (10610076656080).

Almost surely, 2^{21220153312159} is an apocalyptic number.

21220153312159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21220153312159 is an equidigital number, since it uses as much as digits as its factorization.

21220153312159 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 32400, while the sum is 37.

The spelling of 21220153312159 in words is "twenty-one trillion, two hundred twenty billion, one hundred fifty-three million, three hundred twelve thousand, one hundred fifty-nine".