21323120713 has 2 divisors, whose sum is σ = 21323120714. Its totient is φ = 21323120712.

The previous prime is 21323120701. The next prime is 21323120719. The reversal of 21323120713 is 31702132312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16454988729 + 4868131984 = 128277^2 + 69772^2 .

It is a cyclic number.

It is not a de Polignac number, because 21323120713 - 2¹³ = 21323112521 is a prime.

It is not a weakly prime, because it can be changed into another prime (21323120719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10661560356 + 10661560357.

It is an arithmetic number, because the mean of its divisors is an integer number (10661560357).

Almost surely, 2^21323120713 is an apocalyptic number.

It is an amenable number.

21323120713 is a deficient number, since it is larger than the sum of its proper divisors (1).

21323120713 is an equidigital number, since it uses as much as digits as its factorization.

21323120713 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 25.

The spelling of 21323120713 in words is "twenty-one billion, three hundred twenty-three million, one hundred twenty thousand, seven hundred thirteen".