20012501291 has 2 divisors, whose sum is σ = 20012501292. Its totient is φ = 20012501290.

The previous prime is 20012501191. The next prime is 20012501309. The reversal of 20012501291 is 19210521002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20012501291 - 2¹⁴ = 20012484907 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (20012501191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10006250645 + 10006250646.

It is an arithmetic number, because the mean of its divisors is an integer number (10006250646).

Almost surely, 2^20012501291 is an apocalyptic number.

20012501291 is a deficient number, since it is larger than the sum of its proper divisors (1).

20012501291 is an equidigital number, since it uses as much as digits as its factorization.

20012501291 is an evil number, because the sum of its binary digits is even.

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

The spelling of 20012501291 in words is "twenty billion, twelve million, five hundred one thousand, two hundred ninety-one".