111312321321001 has 4 divisors (see below), whose sum is σ = 111627653676372. Its totient is φ = 110996988965632.

The previous prime is 111312321320969. The next prime is 111312321321007. The reversal of 111312321321001 is 100123123213111.

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

It can be written as a sum of positive squares in 2 ways, for example, as 44690241125776 + 66622080195225 = 6685076^2 + 8162235^2 .

It is a cyclic number.

It is not a de Polignac number, because 111312321321001 - 2⁵ = 111312321320969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111312321321007) 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, 157666177156 + ... + 157666177861.

It is an arithmetic number, because the mean of its divisors is an integer number (27906913419093).

Almost surely, 2^{111312321321001} is an apocalyptic number.

It is an amenable number.

111312321321001 is a deficient number, since it is larger than the sum of its proper divisors (315332355371).

111312321321001 is an equidigital number, since it uses as much as digits as its factorization.

111312321321001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 315332355370.

The product of its (nonzero) digits is 216, while the sum is 22.

Adding to 111312321321001 its reverse (100123123213111), we get a palindrome (211435444534112).

The spelling of 111312321321001 in words is "one hundred eleven trillion, three hundred twelve billion, three hundred twenty-one million, three hundred twenty-one thousand, one".