129326346321 has 16 divisors (see below), whose sum is σ = 173059286400. Its totient is φ = 85905886208.

The previous prime is 129326346319. The next prime is 129326346323. The reversal of 129326346321 is 123643623921.

It is an interprime number because it is at equal distance from previous prime (129326346319) and next prime (129326346323).

It is a cyclic number.

It is not a de Polignac number, because 129326346321 - 2¹ = 129326346319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129326346323) 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, 1261375 + ... + 1360043.

It is an arithmetic number, because the mean of its divisors is an integer number (10816205400).

Almost surely, 2^129326346321 is an apocalyptic number.

It is an amenable number.

129326346321 is a deficient number, since it is larger than the sum of its proper divisors (43732940079).

129326346321 is a wasteful number, since it uses less digits than its factorization.

129326346321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100248.

The product of its digits is 279936, while the sum is 42.

The spelling of 129326346321 in words is "one hundred twenty-nine billion, three hundred twenty-six million, three hundred forty-six thousand, three hundred twenty-one".