3320221242421 has 4 divisors (see below), whose sum is σ = 3321867363052. Its totient is φ = 3318575121792.

The previous prime is 3320221242391. The next prime is 3320221242427. The reversal of 3320221242421 is 1242421220233.

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 1896707384100 + 1423513858321 = 1377210^2 + 1193111^2 .

It is a cyclic number.

It is not a de Polignac number, because 3320221242421 - 2⁵ = 3320221242389 is a prime.

It is a super-2 number, since 2×3320221242421² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 3320221242421.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3320221242427) 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, 823057290 + ... + 823061323.

It is an arithmetic number, because the mean of its divisors is an integer number (830466840763).

Almost surely, 2^{3320221242421} is an apocalyptic number.

It is an amenable number.

3320221242421 is a deficient number, since it is larger than the sum of its proper divisors (1646120631).

3320221242421 is a wasteful number, since it uses less digits than its factorization.

3320221242421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646120630.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 3320221242421 its reverse (1242421220233), we get a palindrome (4562642462654).

The spelling of 3320221242421 in words is "three trillion, three hundred twenty billion, two hundred twenty-one million, two hundred forty-two thousand, four hundred twenty-one".