1231351314240 has 56 divisors (see below), whose sum is σ = 3909540425760. Its totient is φ = 328360350208.

The previous prime is 1231351314187. The next prime is 1231351314257. The reversal of 1231351314240 is 424131531321.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1231351314198 and 1231351314207.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 641327850 + ... + 641329769.

Almost surely, 2^{1231351314240} is an apocalyptic number.

1231351314240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231351314240 is an abundant number, since it is smaller than the sum of its proper divisors (2678189111520).

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

1231351314240 is a wasteful number, since it uses less digits than its factorization.

1231351314240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282657639 (or 1282657629 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 1231351314240 its reverse (424131531321), we get a palindrome (1655482845561).

The spelling of 1231351314240 in words is "one trillion, two hundred thirty-one billion, three hundred fifty-one million, three hundred fourteen thousand, two hundred forty".