23013321231209 has 2 divisors, whose sum is σ = 23013321231210. Its totient is φ = 23013321231208.

The previous prime is 23013321231169. The next prime is 23013321231223. The reversal of 23013321231209 is 90213212331032.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 13628442155584 + 9384879075625 = 3691672^2 + 3063475^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-23013321231209 is a prime.

It is a super-2 number, since 2×23013321231209² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (23013321231239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11506660615604 + 11506660615605.

It is an arithmetic number, because the mean of its divisors is an integer number (11506660615605).

Almost surely, 2^{23013321231209} is an apocalyptic number.

It is an amenable number.

23013321231209 is a deficient number, since it is larger than the sum of its proper divisors (1).

23013321231209 is an equidigital number, since it uses as much as digits as its factorization.

23013321231209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11664, while the sum is 32.

The spelling of 23013321231209 in words is "twenty-three trillion, thirteen billion, three hundred twenty-one million, two hundred thirty-one thousand, two hundred nine".