1031320001208 has 128 divisors (see below), whose sum is σ = 3120607710720. Its totient is φ = 277272145920.

The previous prime is 1031320001147. The next prime is 1031320001209. The reversal of 1031320001208 is 8021000231301.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031320001209) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14733460 + ... + 14803292.

It is an arithmetic number, because the mean of its divisors is an integer number (24379747740).

Almost surely, 2^{1031320001208} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1031320001208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1560303855360).

1031320001208 is an abundant number, since it is smaller than the sum of its proper divisors (2089287709512).

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

1031320001208 is a wasteful number, since it uses less digits than its factorization.

1031320001208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75037 (or 75033 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 21.

Adding to 1031320001208 its reverse (8021000231301), we get a palindrome (9052320232509).

The spelling of 1031320001208 in words is "one trillion, thirty-one billion, three hundred twenty million, one thousand, two hundred eight".