1031221320231 has 8 divisors (see below), whose sum is σ = 1374994969984. Its totient is φ = 687464275320.

The previous prime is 1031221320229. The next prime is 1031221320247. The reversal of 1031221320231 is 1320231221301.

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

It is not a de Polignac number, because 1031221320231 - 2¹ = 1031221320229 is a prime.

It is a super-2 number, since 2×1031221320231² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031221320198 and 1031221320207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031221320281) 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, 4005571 + ... + 4255236.

It is an arithmetic number, because the mean of its divisors is an integer number (171874371248).

Almost surely, 2^{1031221320231} is an apocalyptic number.

1031221320231 is a deficient number, since it is larger than the sum of its proper divisors (343773649753).

1031221320231 is an equidigital number, since it uses as much as digits as its factorization.

1031221320231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8302421.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 1031221320231 its reverse (1320231221301), we get a palindrome (2351452541532).

The spelling of 1031221320231 in words is "one trillion, thirty-one billion, two hundred twenty-one million, three hundred twenty thousand, two hundred thirty-one".