1231344014520 has 64 divisors (see below), whose sum is σ = 3793870761120. Its totient is φ = 319483851264.

The previous prime is 1231344014477. The next prime is 1231344014521. The reversal of 1231344014520 is 254104431321.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1231344014521) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 138660427 + ... + 138669306.

Almost surely, 2^{1231344014520} is an apocalyptic number.

1231344014520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1231344014520 is an abundant number, since it is smaller than the sum of its proper divisors (2562526746600).

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

1231344014520 is a wasteful number, since it uses less digits than its factorization.

1231344014520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 277329784 (or 277329780 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

Adding to 1231344014520 its reverse (254104431321), we get a palindrome (1485448445841).

The spelling of 1231344014520 in words is "one trillion, two hundred thirty-one billion, three hundred forty-four million, fourteen thousand, five hundred twenty".