12400403202012 has 24 divisors (see below), whose sum is σ = 33067741872256. Its totient is φ = 3542972343408.

The previous prime is 12400403201993. The next prime is 12400403202013. The reversal of 12400403202012 is 21020230400421.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 12400403202012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12400403202013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 73811923738 + ... + 73811923905.

Almost surely, 2^{12400403202012} is an apocalyptic number.

12400403202012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12400403202012 is an abundant number, since it is smaller than the sum of its proper divisors (20667338670244).

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

12400403202012 is a wasteful number, since it uses less digits than its factorization.

12400403202012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147623847657 (or 147623847655 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

Adding to 12400403202012 its reverse (21020230400421), we get a palindrome (33420633602433).

The spelling of 12400403202012 in words is "twelve trillion, four hundred billion, four hundred three million, two hundred two thousand, twelve".