1313100021040 has 80 divisors (see below), whose sum is σ = 3170760629760. Its totient is φ = 505351642880.

The previous prime is 1313100021029. The next prime is 1313100021041. The reversal of 1313100021040 is 401200013131.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is not an unprimeable number, because it can be changed into a prime (1313100021041) 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, 2737726 + ... + 3181405.

It is an arithmetic number, because the mean of its divisors is an integer number (39634507872).

Almost surely, 2^{1313100021040} is an apocalyptic number.

1313100021040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1313100021040 is an abundant number, since it is smaller than the sum of its proper divisors (1857660608720).

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

1313100021040 is a wasteful number, since it uses less digits than its factorization.

1313100021040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5919250 (or 5919244 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 1313100021040 its reverse (401200013131), we get a palindrome (1714300034171).

The spelling of 1313100021040 in words is "one trillion, three hundred thirteen billion, one hundred million, twenty-one thousand, forty".