1231350131340 has 96 divisors (see below), whose sum is σ = 4378133813760. Its totient is φ = 281451457728.

The previous prime is 1231350131311. The next prime is 1231350131419. The reversal of 1231350131340 is 431310531321.

1231350131340 is a `hidden beast` number, since 1 + 2 + 313 + 5 + 0 + 1 + 3 + 1 + 340 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 162873222 + ... + 162880781.

It is an arithmetic number, because the mean of its divisors is an integer number (45605560560).

Almost surely, 2^{1231350131340} is an apocalyptic number.

1231350131340 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231350131340 is an abundant number, since it is smaller than the sum of its proper divisors (3146783682420).

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

1231350131340 is a wasteful number, since it uses less digits than its factorization.

1231350131340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 325754028 (or 325754020 counting only the distinct ones).

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

Adding to 1231350131340 its reverse (431310531321), we get a palindrome (1662660662661).

The spelling of 1231350131340 in words is "one trillion, two hundred thirty-one billion, three hundred fifty million, one hundred thirty-one thousand, three hundred forty".