1240400013012 has 72 divisors (see below), whose sum is σ = 3228072393000. Its totient is φ = 401308121088.

The previous prime is 1240400013011. The next prime is 1240400013079. The reversal of 1240400013012 is 2103100040421.

1240400013012 is a `hidden beast` number, since 1 + 240 + 400 + 0 + 13 + 0 + 12 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 715117157316 + 525282855696 = 845646^2 + 724764^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240400013011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 593637 + ... + 1683212.

Almost surely, 2^{1240400013012} is an apocalyptic number.

1240400013012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1240400013012 is an abundant number, since it is smaller than the sum of its proper divisors (1987672379988).

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

1240400013012 is a wasteful number, since it uses less digits than its factorization.

1240400013012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2277305 (or 2277300 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 1240400013012 its reverse (2103100040421), we get a palindrome (3343500053433).

The spelling of 1240400013012 in words is "one trillion, two hundred forty billion, four hundred million, thirteen thousand, twelve".