13123311131321 has 16 divisors (see below), whose sum is σ = 14656634904960. Its totient is φ = 11677253103360.

The previous prime is 13123311131303. The next prime is 13123311131327. The reversal of 13123311131321 is 12313111332131.

It is a cyclic number.

It is not a de Polignac number, because 13123311131321 - 2⁶ = 13123311131257 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13123311131327) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 41556710 + ... + 41871311.

It is an arithmetic number, because the mean of its divisors is an integer number (916039681560).

Almost surely, 2^{13123311131321} is an apocalyptic number.

It is an amenable number.

13123311131321 is a deficient number, since it is larger than the sum of its proper divisors (1533323773639).

13123311131321 is a wasteful number, since it uses less digits than its factorization.

13123311131321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83428544.

The product of its digits is 972, while the sum is 26.

Adding to 13123311131321 its reverse (12313111332131), we get a palindrome (25436422463452).

The spelling of 13123311131321 in words is "thirteen trillion, one hundred twenty-three billion, three hundred eleven million, one hundred thirty-one thousand, three hundred twenty-one".