1321120231231 has 8 divisors (see below), whose sum is σ = 1390667670000. Its totient is φ = 1251574272000.

The previous prime is 1321120231187. The next prime is 1321120231241. The reversal of 1321120231231 is 1321320211231.

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 1321120231231 - 2²⁵ = 1321086676799 is a prime.

It is a super-2 number, since 2×1321120231231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321120231241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1784895 + ... + 2414143.

It is an arithmetic number, because the mean of its divisors is an integer number (173833458750).

Almost surely, 2^{1321120231231} is an apocalyptic number.

1321120231231 is a deficient number, since it is larger than the sum of its proper divisors (69547438769).

1321120231231 is a wasteful number, since it uses less digits than its factorization.

1321120231231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 739769.

The product of its (nonzero) digits is 432, while the sum is 22.

Adding to 1321120231231 its reverse (1321320211231), we get a palindrome (2642440442462).

The spelling of 1321120231231 in words is "one trillion, three hundred twenty-one billion, one hundred twenty million, two hundred thirty-one thousand, two hundred thirty-one".