20131323212369 has 2 divisors, whose sum is σ = 20131323212370. Its totient is φ = 20131323212368.

The previous prime is 20131323212303. The next prime is 20131323212401. The reversal of 20131323212369 is 96321232313102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16843538311744 + 3287784900625 = 4104088^2 + 1813225^2 .

It is a cyclic number.

It is not a de Polignac number, because 20131323212369 - 2²⁸ = 20131054776913 is a prime.

It is a super-2 number, since 2×20131323212369² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (20131323212569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10065661606184 + 10065661606185.

It is an arithmetic number, because the mean of its divisors is an integer number (10065661606185).

Almost surely, 2^{20131323212369} is an apocalyptic number.

It is an amenable number.

20131323212369 is a deficient number, since it is larger than the sum of its proper divisors (1).

20131323212369 is an equidigital number, since it uses as much as digits as its factorization.

20131323212369 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 69984, while the sum is 38.

The spelling of 20131323212369 in words is "twenty trillion, one hundred thirty-one billion, three hundred twenty-three million, two hundred twelve thousand, three hundred sixty-nine".