321111323545 has 8 divisors (see below), whose sum is σ = 408000270024. Its totient is φ = 241777937664.

The previous prime is 321111323537. The next prime is 321111323551. The reversal of 321111323545 is 545323111123.

It can be written as a sum of positive squares in 4 ways, for example, as 173952389776 + 147158933769 = 417076^2 + 383613^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 321111323545 - 2³ = 321111323537 is a prime.

It is a super-2 number, since 2×321111323545² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1888890054 + ... + 1888890223.

It is an arithmetic number, because the mean of its divisors is an integer number (51000033753).

Almost surely, 2^321111323545 is an apocalyptic number.

It is an amenable number.

321111323545 is a deficient number, since it is larger than the sum of its proper divisors (86888946479).

321111323545 is a wasteful number, since it uses less digits than its factorization.

321111323545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3777780299.

The product of its digits is 10800, while the sum is 31.

Adding to 321111323545 its reverse (545323111123), we get a palindrome (866434434668).

The spelling of 321111323545 in words is "three hundred twenty-one billion, one hundred eleven million, three hundred twenty-three thousand, five hundred forty-five".