2111422221 has 20 divisors (see below), whose sum is σ = 3155884732. Its totient is φ = 1406818368.

The previous prime is 2111422213. The next prime is 2111422273. The reversal of 2111422221 is 1222241112.

2111422221 is a `hidden beast` number, since 21 + 1 + 1 + 422 + 221 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 743162121 + 1368260100 = 27261^2 + 36990^2 .

It is not a de Polignac number, because 2111422221 - 2³ = 2111422213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2111422194 and 2111422203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2111423221) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 159945 + ... + 172641.

Almost surely, 2^2111422221 is an apocalyptic number.

It is an amenable number.

2111422221 is a deficient number, since it is larger than the sum of its proper divisors (1044462511).

2111422221 is a wasteful number, since it uses less digits than its factorization.

2111422221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14762 (or 14753 counting only the distinct ones).

The product of its digits is 128, while the sum is 18.

The square root of 2111422221 is about 45950.2145914467. The cubic root of 2111422221 is about 1282.8967234756.

Adding to 2111422221 its reverse (1222241112), we get a palindrome (3333663333).

The spelling of 2111422221 in words is "two billion, one hundred eleven million, four hundred twenty-two thousand, two hundred twenty-one".