1031131002221 has 8 divisors (see below), whose sum is σ = 1052789270400. Its totient is φ = 1009692615232.

The previous prime is 1031131002191. The next prime is 1031131002257. The reversal of 1031131002221 is 1222001311301.

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 1031131002221 - 2⁶ = 1031131002157 is a prime.

It is a super-2 number, since 2×1031131002221² (a number of 25 digits) contains 22 as substring.

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 1031131002221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031131302221) 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, 54960821 + ... + 54979578.

It is an arithmetic number, because the mean of its divisors is an integer number (131598658800).

Almost surely, 2^{1031131002221} is an apocalyptic number.

It is an amenable number.

1031131002221 is a deficient number, since it is larger than the sum of its proper divisors (21658268179).

1031131002221 is a wasteful number, since it uses less digits than its factorization.

1031131002221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109940595.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1031131002221 its reverse (1222001311301), we get a palindrome (2253132313522).

The spelling of 1031131002221 in words is "one trillion, thirty-one billion, one hundred thirty-one million, two thousand, two hundred twenty-one".