1213133223231 has 24 divisors (see below), whose sum is σ = 1761077625216. Its totient is φ = 804709684800.

The previous prime is 1213133223223. The next prime is 1213133223251. The reversal of 1213133223231 is 1323223313121.

1213133223231 is a `hidden beast` number, since 1 + 2 + 1 + 3 + 1 + 332 + 2 + 323 + 1 = 666.

It is not a de Polignac number, because 1213133223231 - 2³ = 1213133223223 is a prime.

It is a super-2 number, since 2×1213133223231² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1213133223195 and 1213133223204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213133223251) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3723181 + ... + 4035881.

It is an arithmetic number, because the mean of its divisors is an integer number (73378234384).

Almost surely, 2^{1213133223231} is an apocalyptic number.

1213133223231 is a deficient number, since it is larger than the sum of its proper divisors (547944401985).

1213133223231 is a wasteful number, since it uses less digits than its factorization.

1213133223231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314863 (or 314860 counting only the distinct ones).

The product of its digits is 3888, while the sum is 27.

Adding to 1213133223231 its reverse (1323223313121), we get a palindrome (2536356536352).

The spelling of 1213133223231 in words is "one trillion, two hundred thirteen billion, one hundred thirty-three million, two hundred twenty-three thousand, two hundred thirty-one".