1231323122231 has 4 divisors (see below), whose sum is σ = 1231404827952. Its totient is φ = 1231241416512.

The previous prime is 1231323122191. The next prime is 1231323122251. The reversal of 1231323122231 is 1322213231321.

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 1231323122231 - 2³⁰ = 1230249380407 is a prime.

It is a super-3 number, since 3×1231323122231³ (a number of 37 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1231323122231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231323122251) 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, 40830251 + ... + 40860396.

It is an arithmetic number, because the mean of its divisors is an integer number (307851206988).

Almost surely, 2^{1231323122231} is an apocalyptic number.

1231323122231 is a deficient number, since it is larger than the sum of its proper divisors (81705721).

1231323122231 is an equidigital number, since it uses as much as digits as its factorization.

1231323122231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81705720.

The product of its digits is 2592, while the sum is 26.

Adding to 1231323122231 its reverse (1322213231321), we get a palindrome (2553536353552).

The spelling of 1231323122231 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-three million, one hundred twenty-two thousand, two hundred thirty-one".