1031130012221 has 8 divisors (see below), whose sum is σ = 1041055338840. Its totient is φ = 1021213147968.

The previous prime is 1031130012181. The next prime is 1031130012259. The reversal of 1031130012221 is 1222100311301.

It can be written as a sum of positive squares in 4 ways, for example, as 372209808100 + 658920204121 = 610090^2 + 811739^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1031130012221 is a prime.

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 1031130012221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031130072221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1870586 + ... + 2358251.

It is an arithmetic number, because the mean of its divisors is an integer number (130131917355).

Almost surely, 2^{1031130012221} is an apocalyptic number.

It is an amenable number.

1031130012221 is a deficient number, since it is larger than the sum of its proper divisors (9925326619).

1031130012221 is a wasteful number, since it uses less digits than its factorization.

1031130012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4231183.

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

Adding to 1031130012221 its reverse (1222100311301), we get a palindrome (2253230323522).

The spelling of 1031130012221 in words is "one trillion, thirty-one billion, one hundred thirty million, twelve thousand, two hundred twenty-one".