21080289071 has 2 divisors, whose sum is σ = 21080289072. Its totient is φ = 21080289070.

The previous prime is 21080289053. The next prime is 21080289133. The reversal of 21080289071 is 17098208012.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21080289071 - 2¹⁸ = 21080026927 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21080289001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10540144535 + 10540144536.

It is an arithmetic number, because the mean of its divisors is an integer number (10540144536).

Almost surely, 2^21080289071 is an apocalyptic number.

21080289071 is a deficient number, since it is larger than the sum of its proper divisors (1).

21080289071 is an equidigital number, since it uses as much as digits as its factorization.

21080289071 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16128, while the sum is 38.

The spelling of 21080289071 in words is "twenty-one billion, eighty million, two hundred eighty-nine thousand, seventy-one".