1312040100400 has 120 divisors (see below), whose sum is σ = 3188645511840. Its totient is φ = 518748088320.

The previous prime is 1312040100383. The next prime is 1312040100421. The reversal of 1312040100400 is 40010402131.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 205871614 + ... + 205877986.

It is an arithmetic number, because the mean of its divisors is an integer number (26572045932).

Almost surely, 2^{1312040100400} is an apocalyptic number.

1312040100400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1312040100400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1594322755920).

1312040100400 is an abundant number, since it is smaller than the sum of its proper divisors (1876605411440).

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

1312040100400 is a wasteful number, since it uses less digits than its factorization.

1312040100400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12263 (or 12252 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 1312040100400 its reverse (40010402131), we get a palindrome (1352050502531).

The spelling of 1312040100400 in words is "one trillion, three hundred twelve billion, forty million, one hundred thousand, four hundred".