2122311221 has 8 divisors (see below), whose sum is σ = 2150234880. Its totient is φ = 2094414192.

The previous prime is 2122311203. The next prime is 2122311227. The reversal of 2122311221 is 1221132212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2122311221 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 2122311221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2122311227) 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, 192371 + ... + 203103.

It is an arithmetic number, because the mean of its divisors is an integer number (268779360).

Almost surely, 2^2122311221 is an apocalyptic number.

It is an amenable number.

2122311221 is a deficient number, since it is larger than the sum of its proper divisors (27923659).

2122311221 is a wasteful number, since it uses less digits than its factorization.

2122311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13315.

The product of its digits is 96, while the sum is 17.

The square root of 2122311221 is about 46068.5491523230. The cubic root of 2122311221 is about 1285.0983227062.

Adding to 2122311221 its reverse (1221132212), we get a palindrome (3343443433).

The spelling of 2122311221 in words is "two billion, one hundred twenty-two million, three hundred eleven thousand, two hundred twenty-one".