21140525140439 has 2 divisors, whose sum is σ = 21140525140440. Its totient is φ = 21140525140438.

The previous prime is 21140525140313. The next prime is 21140525140463. The reversal of 21140525140439 is 93404152504112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21140525140439 - 2²⁴ = 21140508363223 is a prime.

It is a super-2 number, since 2×21140525140439² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21140525140396 and 21140525140405.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21140525140939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10570262570219 + 10570262570220.

It is an arithmetic number, because the mean of its divisors is an integer number (10570262570220).

Almost surely, 2^{21140525140439} is an apocalyptic number.

21140525140439 is a deficient number, since it is larger than the sum of its proper divisors (1).

21140525140439 is an equidigital number, since it uses as much as digits as its factorization.

21140525140439 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 172800, while the sum is 41.

The spelling of 21140525140439 in words is "twenty-one trillion, one hundred forty billion, five hundred twenty-five million, one hundred forty thousand, four hundred thirty-nine".