321564506221103 has 4 divisors (see below), whose sum is σ = 322725388915320. Its totient is φ = 320403623526888.

The previous prime is 321564506221099. The next prime is 321564506221183. The reversal of 321564506221103 is 301122605465123.

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 321564506221103 - 2² = 321564506221099 is a prime.

It is a super-2 number, since 2×321564506221103² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (321564506221183) 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, 580441346693 + ... + 580441347246.

It is an arithmetic number, because the mean of its divisors is an integer number (80681347228830).

Almost surely, 2^{321564506221103} is an apocalyptic number.

321564506221103 is a deficient number, since it is larger than the sum of its proper divisors (1160882694217).

321564506221103 is a wasteful number, since it uses less digits than its factorization.

321564506221103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1160882694216.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 321564506221103 in words is "three hundred twenty-one trillion, five hundred sixty-four billion, five hundred six million, two hundred twenty-one thousand, one hundred three".