1321312122231 has 8 divisors (see below), whose sum is σ = 1761819727344. Its totient is φ = 880839632640.

The previous prime is 1321312122191. The next prime is 1321312122281. The reversal of 1321312122231 is 1322212131231.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1321312122231 - 2⁹ = 1321312121719 is a prime.

It is a super-2 number, since 2×1321312122231² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1321312122281) 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, 8690956 + ... + 8841681.

It is an arithmetic number, because the mean of its divisors is an integer number (220227465918).

Almost surely, 2^{1321312122231} is an apocalyptic number.

1321312122231 is a deficient number, since it is larger than the sum of its proper divisors (440507605113).

1321312122231 is a wasteful number, since it uses less digits than its factorization.

1321312122231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17557761.

The product of its digits is 864, while the sum is 24.

Adding to 1321312122231 its reverse (1322212131231), we get a palindrome (2643524253462).

The spelling of 1321312122231 in words is "one trillion, three hundred twenty-one billion, three hundred twelve million, one hundred twenty-two thousand, two hundred thirty-one".