1231353021132 has 36 divisors (see below), whose sum is σ = 3352016558800. Its totient is φ = 378877852512.

The previous prime is 1231353021091. The next prime is 1231353021139. The reversal of 1231353021132 is 2311203531321.

1231353021132 is a `hidden beast` number, since 1 + 2 + 3 + 13 + 530 + 2 + 113 + 2 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×1231353021132² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1231353021096 and 1231353021105.

It is not an unprimeable number, because it can be changed into a prime (1231353021139) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1315547632 + ... + 1315548567.

Almost surely, 2^{1231353021132} is an apocalyptic number.

1231353021132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1231353021132 is an abundant number, since it is smaller than the sum of its proper divisors (2120663537668).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1231353021132 is a wasteful number, since it uses less digits than its factorization.

1231353021132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2631096222 (or 2631096217 counting only the distinct ones).

The product of its (nonzero) digits is 3240, while the sum is 27.

Adding to 1231353021132 its reverse (2311203531321), we get a palindrome (3542556552453).

The spelling of 1231353021132 in words is "one trillion, two hundred thirty-one billion, three hundred fifty-three million, twenty-one thousand, one hundred thirty-two".