2142220321 has 8 divisors (see below), whose sum is σ = 2187583200. Its totient is φ = 2097159360.

The previous prime is 2142220319. The next prime is 2142220349. The reversal of 2142220321 is 1230222412.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2142220321 - 2¹ = 2142220319 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2142220361) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61111 + ... + 89548.

It is an arithmetic number, because the mean of its divisors is an integer number (273447900).

Almost surely, 2^2142220321 is an apocalyptic number.

It is an amenable number.

2142220321 is a deficient number, since it is larger than the sum of its proper divisors (45362879).

2142220321 is a wasteful number, since it uses less digits than its factorization.

2142220321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150959.

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

The square root of 2142220321 is about 46284.1260152982. The cubic root of 2142220321 is about 1289.1042638965.

Adding to 2142220321 its reverse (1230222412), we get a palindrome (3372442733).

The spelling of 2142220321 in words is "two billion, one hundred forty-two million, two hundred twenty thousand, three hundred twenty-one".