3220142221 has 4 divisors (see below), whose sum is σ = 3237933244. Its totient is φ = 3202351200.

The previous prime is 3220142203. The next prime is 3220142231. The reversal of 3220142221 is 1222410223.

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 47073321 + 3173068900 = 6861^2 + 56330^2 .

It is a cyclic number.

It is not a de Polignac number, because 3220142221 - 2²³ = 3211753613 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3220142231) 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, 8895240 + ... + 8895601.

It is an arithmetic number, because the mean of its divisors is an integer number (809483311).

Almost surely, 2^3220142221 is an apocalyptic number.

It is an amenable number.

3220142221 is a deficient number, since it is larger than the sum of its proper divisors (17791023).

3220142221 is a wasteful number, since it uses less digits than its factorization.

3220142221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17791022.

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 3220142221 is about 56746.2969805079. The cubic root of 3220142221 is about 1476.6979922311.

Adding to 3220142221 its reverse (1222410223), we get a palindrome (4442552444).

The spelling of 3220142221 in words is "three billion, two hundred twenty million, one hundred forty-two thousand, two hundred twenty-one".