1231301112321 has 12 divisors (see below), whose sum is σ = 1909773154032. Its totient is φ = 703600635528.

The previous prime is 1231301112311. The next prime is 1231301112347. The reversal of 1231301112321 is 1232111031321.

It is not a de Polignac number, because 1231301112321 - 2⁶ = 1231301112257 is a prime.

It is a super-2 number, since 2×1231301112321² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (1231301112311) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4188098875 + ... + 4188099168.

It is an arithmetic number, because the mean of its divisors is an integer number (159147762836).

Almost surely, 2^{1231301112321} is an apocalyptic number.

It is an amenable number.

1231301112321 is a deficient number, since it is larger than the sum of its proper divisors (678472041711).

1231301112321 is an equidigital number, since it uses as much as digits as its factorization.

1231301112321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8376198060 (or 8376198053 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 21.

Adding to 1231301112321 its reverse (1232111031321), we get a palindrome (2463412143642).

The spelling of 1231301112321 in words is "one trillion, two hundred thirty-one billion, three hundred one million, one hundred twelve thousand, three hundred twenty-one".