1013220323221 has 4 divisors (see below), whose sum is σ = 1013230360972. Its totient is φ = 1013210285472.

The previous prime is 1013220323123. The next prime is 1013220323237. The reversal of 1013220323221 is 1223230223101.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 369069615121 + 644150708100 = 607511^2 + 802590^2 .

It is a cyclic number.

It is not a de Polignac number, because 1013220323221 - 2³⁵ = 978860584853 is a prime.

It is a super-3 number, since 3×1013220323221³ (a number of 37 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 = 1013220323192 and 1013220323201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1013220323281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4865910 + ... + 5069863.

It is an arithmetic number, because the mean of its divisors is an integer number (253307590243).

Almost surely, 2^{1013220323221} is an apocalyptic number.

It is an amenable number.

1013220323221 is a deficient number, since it is larger than the sum of its proper divisors (10037751).

1013220323221 is an equidigital number, since it uses as much as digits as its factorization.

1013220323221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10037750.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1013220323221 its reverse (1223230223101), we get a palindrome (2236450546322).

The spelling of 1013220323221 in words is "one trillion, thirteen billion, two hundred twenty million, three hundred twenty-three thousand, two hundred twenty-one".