1231310133240 has 128 divisors (see below), whose sum is σ = 4052255558400. Its totient is φ = 296831774720.

The previous prime is 1231310133223. The next prime is 1231310133349. The reversal of 1231310133240 is 423310131321.

It is a super-2 number, since 2×1231310133240² (a number of 25 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1231310133240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2369337 + ... + 2841896.

It is an arithmetic number, because the mean of its divisors is an integer number (31658246550).

Almost surely, 2^{1231310133240} is an apocalyptic number.

1231310133240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231310133240 is an abundant number, since it is smaller than the sum of its proper divisors (2820945425160).

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

1231310133240 is a wasteful number, since it uses less digits than its factorization.

1231310133240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5211437 (or 5211433 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

Adding to 1231310133240 its reverse (423310131321), we get a palindrome (1654620264561).

The spelling of 1231310133240 in words is "one trillion, two hundred thirty-one billion, three hundred ten million, one hundred thirty-three thousand, two hundred forty".