21140525140939 has 2 divisors, whose sum is σ = 21140525140940. Its totient is φ = 21140525140938.

The previous prime is 21140525140907. The next prime is 21140525140957. The reversal of 21140525140939 is 93904152504112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21140525140939 - 2⁵ = 21140525140907 is a prime.

It is not a weakly prime, because it can be changed into another prime (21140525140439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570262570469 + 10570262570470.

It is an arithmetic number, because the mean of its divisors is an integer number (10570262570470).

Almost surely, 2^{21140525140939} is an apocalyptic number.

21140525140939 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140525140939 is an equidigital number, since it uses as much as digits as its factorization.

21140525140939 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 46.

The spelling of 21140525140939 in words is "twenty-one trillion, one hundred forty billion, five hundred twenty-five million, one hundred forty thousand, nine hundred thirty-nine".