321129055807 has 16 divisors (see below), whose sum is σ = 388053084160. Its totient is φ = 259597071072.

The previous prime is 321129055777. The next prime is 321129055823. The reversal of 321129055807 is 708550921123.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 321129055807 - 2²⁷ = 320994838079 is a prime.

It is the 566683-rd Hogben number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321129055207) by changing a digit.

It is a nontrivial repunit in base 566682.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5384028 + ... + 5443345.

It is an arithmetic number, because the mean of its divisors is an integer number (24253317760).

Almost surely, 2^321129055807 is an apocalyptic number.

321129055807 is a deficient number, since it is larger than the sum of its proper divisors (66924028353).

321129055807 is a wasteful number, since it uses less digits than its factorization.

321129055807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10827622.

The product of its (nonzero) digits is 151200, while the sum is 43.

The spelling of 321129055807 in words is "three hundred twenty-one billion, one hundred twenty-nine million, fifty-five thousand, eight hundred seven".