1310321022221 has 4 divisors (see below), whose sum is σ = 1367291501472. Its totient is φ = 1253350542972.

The previous prime is 1310321022217. The next prime is 1310321022233. The reversal of 1310321022221 is 1222201230131.

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 1310321022221 - 2² = 1310321022217 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1310321022193 and 1310321022202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1310321022211) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28485239591 + ... + 28485239636.

It is an arithmetic number, because the mean of its divisors is an integer number (341822875368).

Almost surely, 2^{1310321022221} is an apocalyptic number.

It is an amenable number.

1310321022221 is a deficient number, since it is larger than the sum of its proper divisors (56970479251).

1310321022221 is an equidigital number, since it uses as much as digits as its factorization.

1310321022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56970479250.

The product of its (nonzero) digits is 288, while the sum is 20.

Adding to 1310321022221 its reverse (1222201230131), we get a palindrome (2532522252352).

The spelling of 1310321022221 in words is "one trillion, three hundred ten billion, three hundred twenty-one million, twenty-two thousand, two hundred twenty-one".