2123422221 has 16 divisors (see below), whose sum is σ = 2937420288. Its totient is φ = 1362984000.

The previous prime is 2123422207. The next prime is 2123422289. The reversal of 2123422221 is 1222243212.

2123422221 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2123422221 - 2¹⁰ = 2123421197 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2123423221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39630 + ... + 76271.

It is an arithmetic number, because the mean of its divisors is an integer number (183588768).

Almost surely, 2^2123422221 is an apocalyptic number.

It is an amenable number.

2123422221 is a deficient number, since it is larger than the sum of its proper divisors (813998067).

2123422221 is a wasteful number, since it uses less digits than its factorization.

2123422221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116132.

The product of its digits is 768, while the sum is 21.

The square root of 2123422221 is about 46080.6056926339. The cubic root of 2123422221 is about 1285.3225272055.

Adding to 2123422221 its reverse (1222243212), we get a palindrome (3345665433).

The spelling of 2123422221 in words is "two billion, one hundred twenty-three million, four hundred twenty-two thousand, two hundred twenty-one".