1231322233131 has 20 divisors (see below), whose sum is σ = 1839420522984. Its totient is φ = 820864562400.

The previous prime is 1231322233117. The next prime is 1231322233159. The reversal of 1231322233131 is 1313322231321.

1231322233131 is a `hidden beast` number, since 1 + 2 + 3 + 1 + 322 + 2 + 331 + 3 + 1 = 666.

It is not a de Polignac number, because 1231322233131 - 2¹⁹ = 1231321708843 is a prime.

It is a super-2 number, since 2×1231322233131² (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 = 1231322233095 and 1231322233104.

It is not an unprimeable number, because it can be changed into a prime (1231322233171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4730911 + ... + 4984391.

Almost surely, 2^{1231322233131} is an apocalyptic number.

1231322233131 is a deficient number, since it is larger than the sum of its proper divisors (608098289853).

1231322233131 is an equidigital number, since it uses as much as digits as its factorization.

1231322233131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313464 (or 313455 counting only the distinct ones).

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

Adding to 1231322233131 its reverse (1313322231321), we get a palindrome (2544644464452).

The spelling of 1231322233131 in words is "one trillion, two hundred thirty-one billion, three hundred twenty-two million, two hundred thirty-three thousand, one hundred thirty-one".