111023121320321 has 8 divisors (see below), whose sum is σ = 129473027779200. Its totient is φ = 95162675417124.

The previous prime is 111023121320317. The next prime is 111023121320369. The reversal of 111023121320321 is 123023121320111.

It is a happy number.

It is not a de Polignac number, because 111023121320321 - 2² = 111023121320317 is a prime.

It is a super-2 number, since 2×111023121320321² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (111023121320381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 161841284381 + ... + 161841285066.

It is an arithmetic number, because the mean of its divisors is an integer number (16184128472400).

Almost surely, 2^{111023121320321} is an apocalyptic number.

It is an amenable number.

111023121320321 is a deficient number, since it is larger than the sum of its proper divisors (18449906458879).

111023121320321 is an frugal number, since it uses more digits than its factorization.

111023121320321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 323682569468 (or 323682569454 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 111023121320321 its reverse (123023121320111), we get a palindrome (234046242640432).

The spelling of 111023121320321 in words is "one hundred eleven trillion, twenty-three billion, one hundred twenty-one million, three hundred twenty thousand, three hundred twenty-one".