3221020122121 has 4 divisors (see below), whose sum is σ = 3221036737744. Its totient is φ = 3221003506500.

The previous prime is 3221020122101. The next prime is 3221020122149. The reversal of 3221020122121 is 1212210201223.

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 3221020122121 - 2⁹ = 3221020121609 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3221020122101) 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, 8013555 + ... + 8405896.

It is an arithmetic number, because the mean of its divisors is an integer number (805259184436).

Almost surely, 2^{3221020122121} is an apocalyptic number.

It is an amenable number.

3221020122121 is a deficient number, since it is larger than the sum of its proper divisors (16615623).

3221020122121 is a wasteful number, since it uses less digits than its factorization.

3221020122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16615622.

The product of its (nonzero) digits is 192, while the sum is 19.

Adding to 3221020122121 its reverse (1212210201223), we get a palindrome (4433230323344).

The spelling of 3221020122121 in words is "three trillion, two hundred twenty-one billion, twenty million, one hundred twenty-two thousand, one hundred twenty-one".