1323121002331 has 4 divisors (see below), whose sum is σ = 1323146156464. Its totient is φ = 1323095848200.

The previous prime is 1323121002271. The next prime is 1323121002389. The reversal of 1323121002331 is 1332001213231.

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 1323121002331 - 2³⁵ = 1288761263963 is a prime.

It is a super-2 number, since 2×1323121002331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1323121002431) 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, 12498000 + ... + 12603421.

It is an arithmetic number, because the mean of its divisors is an integer number (330786539116).

Almost surely, 2^{1323121002331} is an apocalyptic number.

1323121002331 is a deficient number, since it is larger than the sum of its proper divisors (25154133).

1323121002331 is an equidigital number, since it uses as much as digits as its factorization.

1323121002331 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25154132.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 1323121002331 its reverse (1332001213231), we get a palindrome (2655122215562).

The spelling of 1323121002331 in words is "one trillion, three hundred twenty-three billion, one hundred twenty-one million, two thousand, three hundred thirty-one".