2121314221 has 16 divisors (see below), whose sum is σ = 2360655360. Its totient is φ = 1892986560.

The previous prime is 2121314207. The next prime is 2121314233. The reversal of 2121314221 is 1224131212.

It is a cyclic number.

It is not a de Polignac number, because 2121314221 - 2⁵ = 2121314189 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 (2121317221) 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, 493146 + ... + 497428.

It is an arithmetic number, because the mean of its divisors is an integer number (147540960).

Almost surely, 2^2121314221 is an apocalyptic number.

It is an amenable number.

2121314221 is a deficient number, since it is larger than the sum of its proper divisors (239341139).

2121314221 is a wasteful number, since it uses less digits than its factorization.

2121314221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5556.

The product of its digits is 192, while the sum is 19.

The square root of 2121314221 is about 46057.7270498665. The cubic root of 2121314221 is about 1284.8970572653.

Adding to 2121314221 its reverse (1224131212), we get a palindrome (3345445433).

The spelling of 2121314221 in words is "two billion, one hundred twenty-one million, three hundred fourteen thousand, two hundred twenty-one".