1231232323131 has 10 divisors (see below), whose sum is σ = 1839248285292. Its totient is φ = 820821548700.

The previous prime is 1231232323121. The next prime is 1231232323169. The reversal of 1231232323131 is 1313232321321.

1231232323131 is a `hidden beast` number, since 1 + 2 + 312 + 3 + 2 + 32 + 313 + 1 = 666.

It is not a de Polignac number, because 1231232323131 - 2⁶ = 1231232323067 is a prime.

It is a super-2 number, since 2×1231232323131² (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 = 1231232323095 and 1231232323104.

It is not an unprimeable number, because it can be changed into a prime (1231232323121) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 7600199445 + ... + 7600199606.

Almost surely, 2^{1231232323131} is an apocalyptic number.

1231232323131 is a deficient number, since it is larger than the sum of its proper divisors (608015962161).

1231232323131 is an equidigital number, since it uses as much as digits as its factorization.

1231232323131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15200399063 (or 15200399054 counting only the distinct ones).

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

Adding to 1231232323131 its reverse (1313232321321), we get a palindrome (2544464644452).

The spelling of 1231232323131 in words is "one trillion, two hundred thirty-one billion, two hundred thirty-two million, three hundred twenty-three thousand, one hundred thirty-one".