21125353322039 has 2 divisors, whose sum is σ = 21125353322040. Its totient is φ = 21125353322038.

The previous prime is 21125353321889. The next prime is 21125353322069. The reversal of 21125353322039 is 93022335352112.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21125353322039 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 21125353321987 and 21125353322005.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21125353322069) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10562676661019 + 10562676661020.

It is an arithmetic number, because the mean of its divisors is an integer number (10562676661020).

Almost surely, 2^{21125353322039} is an apocalyptic number.

21125353322039 is a deficient number, since it is larger than the sum of its proper divisors (1).

21125353322039 is an equidigital number, since it uses as much as digits as its factorization.

21125353322039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 291600, while the sum is 41.

The spelling of 21125353322039 in words is "twenty-one trillion, one hundred twenty-five billion, three hundred fifty-three million, three hundred twenty-two thousand, thirty-nine".