1213312232231 has 16 divisors (see below), whose sum is σ = 1348679922048. Its totient is φ = 1082125168800.

The previous prime is 1213312232213. The next prime is 1213312232267. The reversal of 1213312232231 is 1322322133121.

It is a cyclic number.

It is not a de Polignac number, because 1213312232231 - 2¹⁰ = 1213312231207 is a prime.

It is a super-2 number, since 2×1213312232231² (a number of 25 digits) contains 22 as substring.

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 1213312232231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213312232281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9513596 + ... + 9640286.

It is an arithmetic number, because the mean of its divisors is an integer number (84292495128).

Almost surely, 2^{1213312232231} is an apocalyptic number.

1213312232231 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1213312232231 is a deficient number, since it is larger than the sum of its proper divisors (135367689817).

1213312232231 is a wasteful number, since it uses less digits than its factorization.

1213312232231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143182.

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

Adding to 1213312232231 its reverse (1322322133121), we get a palindrome (2535634365352).

The spelling of 1213312232231 in words is "one trillion, two hundred thirteen billion, three hundred twelve million, two hundred thirty-two thousand, two hundred thirty-one".