13123102321 has 16 divisors (see below), whose sum is σ = 15325839360. Its totient is φ = 11002646160.

The previous prime is 13123102313. The next prime is 13123102327. The reversal of 13123102321 is 12320132131.

It is a cyclic number.

It is not a de Polignac number, because 13123102321 - 2³ = 13123102313 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13123102327) 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, 604900 + ... + 626218.

It is an arithmetic number, because the mean of its divisors is an integer number (957864960).

Almost surely, 2^13123102321 is an apocalyptic number.

It is an amenable number.

13123102321 is a deficient number, since it is larger than the sum of its proper divisors (2202737039).

13123102321 is a wasteful number, since it uses less digits than its factorization.

13123102321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23244.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 13123102321 its reverse (12320132131), we get a palindrome (25443234452).

It can be divided in two parts, 1312310 and 2321, that added together give a triangular number (1314631 = T₁₆₂₁).

The spelling of 13123102321 in words is "thirteen billion, one hundred twenty-three million, one hundred two thousand, three hundred twenty-one".