14157126821 has 2 divisors, whose sum is σ = 14157126822. Its totient is φ = 14157126820.

The previous prime is 14157126811. The next prime is 14157126889. The reversal of 14157126821 is 12862175141.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 14128888225 + 28238596 = 118865^2 + 5314^2 .

It is a cyclic number.

It is not a de Polignac number, because 14157126821 - 2¹⁴ = 14157110437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (14157126811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7078563410 + 7078563411.

It is an arithmetic number, because the mean of its divisors is an integer number (7078563411).

Almost surely, 2^14157126821 is an apocalyptic number.

It is an amenable number.

14157126821 is a deficient number, since it is larger than the sum of its proper divisors (1).

14157126821 is an equidigital number, since it uses as much as digits as its factorization.

14157126821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 26880, while the sum is 38.

The spelling of 14157126821 in words is "fourteen billion, one hundred fifty-seven million, one hundred twenty-six thousand, eight hundred twenty-one".