1321231213233 has 32 divisors (see below), whose sum is σ = 2116086057600. Its totient is φ = 811908785088.

The previous prime is 1321231213207. The next prime is 1321231213277. The reversal of 1321231213233 is 3323121321231.

1321231213233 is a `hidden beast` number, since 1 + 3 + 21 + 2 + 312 + 1 + 323 + 3 = 666.

It is not a de Polignac number, because 1321231213233 - 2¹⁶ = 1321231147697 is a prime.

It is a super-2 number, since 2×1321231213233² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 1321231213197 and 1321231213206.

It is not an unprimeable number, because it can be changed into a prime (1321231213733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 34785066 + ... + 34823027.

It is an arithmetic number, because the mean of its divisors is an integer number (66127689300).

Almost surely, 2^{1321231213233} is an apocalyptic number.

It is an amenable number.

1321231213233 is a deficient number, since it is larger than the sum of its proper divisors (794854844367).

1321231213233 is a wasteful number, since it uses less digits than its factorization.

1321231213233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69608158 (or 69608152 counting only the distinct ones).

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

Adding to 1321231213233 its reverse (3323121321231), we get a palindrome (4644352534464).

The spelling of 1321231213233 in words is "one trillion, three hundred twenty-one billion, two hundred thirty-one million, two hundred thirteen thousand, two hundred thirty-three".