3120320022221 has 4 divisors (see below), whose sum is σ = 3124120656444. Its totient is φ = 3116519388000.

The previous prime is 3120320022179. The next prime is 3120320022227. The reversal of 3120320022221 is 1222200230213.

It is a happy number.

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 1452965052100 + 1667354970121 = 1205390^2 + 1291261^2 .

It is a cyclic number.

It is not a de Polignac number, because 3120320022221 - 2³⁸ = 2845442115277 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3120320022193 and 3120320022202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3120320022227) 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, 1900315880 + ... + 1900317521.

It is an arithmetic number, because the mean of its divisors is an integer number (781030164111).

Almost surely, 2^{3120320022221} is an apocalyptic number.

It is an amenable number.

3120320022221 is a deficient number, since it is larger than the sum of its proper divisors (3800634223).

3120320022221 is an equidigital number, since it uses as much as digits as its factorization.

3120320022221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3800634222.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 3120320022221 its reverse (1222200230213), we get a palindrome (4342520252434).

The spelling of 3120320022221 in words is "three trillion, one hundred twenty billion, three hundred twenty million, twenty-two thousand, two hundred twenty-one".