12420131040400 has 120 divisors (see below), whose sum is σ = 31323993350400. Its totient is φ = 4726304371200.

The previous prime is 12420131040389. The next prime is 12420131040403. The reversal of 12420131040400 is 404013102421.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (12420131040403) 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, 7756735 + ... + 9219934.

It is an arithmetic number, because the mean of its divisors is an integer number (261033277920).

Almost surely, 2^{12420131040400} is an apocalyptic number.

12420131040400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12420131040400 is an abundant number, since it is smaller than the sum of its proper divisors (18903862310000).

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

12420131040400 is a wasteful number, since it uses less digits than its factorization.

12420131040400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16976777 (or 16976766 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 12420131040400 its reverse (404013102421), we get a palindrome (12824144142821).

The spelling of 12420131040400 in words is "twelve trillion, four hundred twenty billion, one hundred thirty-one million, forty thousand, four hundred".