3021231221 has 4 divisors (see below), whose sum is σ = 3021444000. Its totient is φ = 3021018444.

The previous prime is 3021231209. The next prime is 3021231251. The reversal of 3021231221 is 1221321203.

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 3021231221 - 2²² = 3017036917 is a prime.

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 3021231221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3021231251) 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, 83441 + ... + 114038.

It is an arithmetic number, because the mean of its divisors is an integer number (755361000).

Almost surely, 2^3021231221 is an apocalyptic number.

It is an amenable number.

3021231221 is a deficient number, since it is larger than the sum of its proper divisors (212779).

3021231221 is a wasteful number, since it uses less digits than its factorization.

3021231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 212778.

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 3021231221 is about 54965.7276946280. The cubic root of 3021231221 is about 1445.6438777529.

Adding to 3021231221 its reverse (1221321203), we get a palindrome (4242552424).

The spelling of 3021231221 in words is "three billion, twenty-one million, two hundred thirty-one thousand, two hundred twenty-one".