1231232320231 has 4 divisors (see below), whose sum is σ = 1261262376864. Its totient is φ = 1201202263600.

The previous prime is 1231232320211. The next prime is 1231232320237. The reversal of 1231232320231 is 1320232321321.

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 1231232320231 - 2⁷ = 1231232320103 is a prime.

It is a super-2 number, since 2×1231232320231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1231232320196 and 1231232320205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231232320237) 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, 15015028255 + ... + 15015028336.

It is an arithmetic number, because the mean of its divisors is an integer number (315315594216).

Almost surely, 2^{1231232320231} is an apocalyptic number.

1231232320231 is a deficient number, since it is larger than the sum of its proper divisors (30030056633).

1231232320231 is an equidigital number, since it uses as much as digits as its factorization.

1231232320231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30030056632.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 1231232320231 its reverse (1320232321321), we get a palindrome (2551464641552).

The spelling of 1231232320231 in words is "one trillion, two hundred thirty-one billion, two hundred thirty-two million, three hundred twenty thousand, two hundred thirty-one".