13231223099 has 2 divisors, whose sum is σ = 13231223100. Its totient is φ = 13231223098.

The previous prime is 13231223081. The next prime is 13231223149. The reversal of 13231223099 is 99032213231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13231223099 - 2¹² = 13231219003 is a prime.

It is a super-2 number, since 2×13231223099² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13231223009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6615611549 + 6615611550.

It is an arithmetic number, because the mean of its divisors is an integer number (6615611550).

Almost surely, 2^13231223099 is an apocalyptic number.

13231223099 is a deficient number, since it is larger than the sum of its proper divisors (1).

13231223099 is an equidigital number, since it uses as much as digits as its factorization.

13231223099 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17496, while the sum is 35.

The spelling of 13231223099 in words is "thirteen billion, two hundred thirty-one million, two hundred twenty-three thousand, ninety-nine".