1313122022221 has 4 divisors (see below), whose sum is σ = 1343659743712. Its totient is φ = 1282584300732.

The previous prime is 1313122022213. The next prime is 1313122022237. The reversal of 1313122022221 is 1222202213131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1313122022221 - 2³ = 1313122022213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1313122022192 and 1313122022201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313122022321) 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, 15268860681 + ... + 15268860766.

It is an arithmetic number, because the mean of its divisors is an integer number (335914935928).

Almost surely, 2^{1313122022221} is an apocalyptic number.

It is an amenable number.

1313122022221 is a deficient number, since it is larger than the sum of its proper divisors (30537721491).

1313122022221 is an equidigital number, since it uses as much as digits as its factorization.

1313122022221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30537721490.

The product of its (nonzero) digits is 576, while the sum is 22.

Adding to 1313122022221 its reverse (1222202213131), we get a palindrome (2535324235352).

The spelling of 1313122022221 in words is "one trillion, three hundred thirteen billion, one hundred twenty-two million, twenty-two thousand, two hundred twenty-one".