21142999987159 has 2 divisors, whose sum is σ = 21142999987160. Its totient is φ = 21142999987158.

The previous prime is 21142999987157. The next prime is 21142999987189. The reversal of 21142999987159 is 95178999924112.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21142999987159 - 2¹ = 21142999987157 is a prime.

Together with 21142999987157, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21142999987157) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10571499993579 + 10571499993580.

It is an arithmetic number, because the mean of its divisors is an integer number (10571499993580).

Almost surely, 2^{21142999987159} is an apocalyptic number.

21142999987159 is a deficient number, since it is larger than the sum of its proper divisors (1).

21142999987159 is an equidigital number, since it uses as much as digits as its factorization.

21142999987159 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 264539520, while the sum is 76.

The spelling of 21142999987159 in words is "twenty-one trillion, one hundred forty-two billion, nine hundred ninety-nine million, nine hundred eighty-seven thousand, one hundred fifty-nine".