1031331004021 has 8 divisors (see below), whose sum is σ = 1093535758080. Its totient is φ = 969918667488.

The previous prime is 1031331003973. The next prime is 1031331004027. The reversal of 1031331004021 is 1204001331301.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1031331004021 - 2³⁹ = 481575190133 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1031331004021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031331004027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 198101701 + ... + 198106906.

It is an arithmetic number, because the mean of its divisors is an integer number (136691969760).

Almost surely, 2^{1031331004021} is an apocalyptic number.

It is an amenable number.

1031331004021 is a deficient number, since it is larger than the sum of its proper divisors (62204754059).

1031331004021 is a wasteful number, since it uses less digits than its factorization.

1031331004021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 396208763.

The product of its (nonzero) digits is 216, while the sum is 19.

Adding to 1031331004021 its reverse (1204001331301), we get a palindrome (2235332335322).

The spelling of 1031331004021 in words is "one trillion, thirty-one billion, three hundred thirty-one million, four thousand, twenty-one".