1020031321331 has 16 divisors (see below), whose sum is σ = 1151175767040. Its totient is φ = 895291666080.

The previous prime is 1020031321303. The next prime is 1020031321357. The reversal of 1020031321331 is 1331231300201.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1020031321331 is a prime.

It is a super-2 number, since 2×1020031321331² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020031321381) 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, 12664670 + ... + 12744956.

It is an arithmetic number, because the mean of its divisors is an integer number (71948485440).

Almost surely, 2^{1020031321331} is an apocalyptic number.

1020031321331 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1020031321331 is a deficient number, since it is larger than the sum of its proper divisors (131144445709).

1020031321331 is a wasteful number, since it uses less digits than its factorization.

1020031321331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120154.

The product of its (nonzero) digits is 324, while the sum is 20.

Adding to 1020031321331 its reverse (1331231300201), we get a palindrome (2351262621532).

The spelling of 1020031321331 in words is "one trillion, twenty billion, thirty-one million, three hundred twenty-one thousand, three hundred thirty-one".