321630356611051 has 4 divisors (see below), whose sum is σ = 321631267636600. Its totient is φ = 321629445585504.

The previous prime is 321630356611037. The next prime is 321630356611073. The reversal of 321630356611051 is 150116653036123.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 321630356611051 - 2⁵ = 321630356611019 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 321630356610989 and 321630356611007.

It is not an unprimeable number, because it can be changed into a prime (321630353611051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 454983006 + ... + 455689363.

It is an arithmetic number, because the mean of its divisors is an integer number (80407816909150).

Almost surely, 2^{321630356611051} is an apocalyptic number.

321630356611051 is a deficient number, since it is larger than the sum of its proper divisors (911025549).

321630356611051 is an equidigital number, since it uses as much as digits as its factorization.

321630356611051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 911025548.

The product of its (nonzero) digits is 291600, while the sum is 43.

The spelling of 321630356611051 in words is "three hundred twenty-one trillion, six hundred thirty billion, three hundred fifty-six million, six hundred eleven thousand, fifty-one".