1031221313 has 8 divisors (see below), whose sum is σ = 1077656448. Its totient is φ = 985806864.

The previous prime is 1031221297. The next prime is 1031221337. The reversal of 1031221313 is 3131221301.

1031221313 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 1031221313 - 2⁴ = 1031221297 is a prime.

It is a super-3 number, since 3×1031221313³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031221291 and 1031221300.

It is not an unprimeable number, because it can be changed into a prime (1031221393) 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, 253106 + ... + 257147.

It is an arithmetic number, because the mean of its divisors is an integer number (134707056).

Almost surely, 2^1031221313 is an apocalyptic number.

It is an amenable number.

1031221313 is a deficient number, since it is larger than the sum of its proper divisors (46435135).

1031221313 is an equidigital number, since it uses as much as digits as its factorization.

1031221313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510343.

The product of its (nonzero) digits is 108, while the sum is 17.

The square root of 1031221313 is about 32112.6347875723. The cubic root of 1031221313 is about 1010.3006369028.

Adding to 1031221313 its reverse (3131221301), we get a palindrome (4162442614).

The spelling of 1031221313 in words is "one billion, thirty-one million, two hundred twenty-one thousand, three hundred thirteen".