22031222121 has 12 divisors (see below), whose sum is σ = 32599044660. Its totient is φ = 14329249920.

The previous prime is 22031222111. The next prime is 22031222149. The reversal of 22031222121 is 12122213022.

It can be written as a sum of positive squares in 2 ways, for example, as 12952943721 + 9078278400 = 113811^2 + 95280^2 .

It is not a de Polignac number, because 22031222121 - 2¹¹ = 22031220073 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 22031222094 and 22031222103.

It is not an unprimeable number, because it can be changed into a prime (22031222111) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29852236 + ... + 29852973.

It is an arithmetic number, because the mean of its divisors is an integer number (2716587055).

Almost surely, 2^22031222121 is an apocalyptic number.

It is an amenable number.

22031222121 is a deficient number, since it is larger than the sum of its proper divisors (10567822539).

22031222121 is a wasteful number, since it uses less digits than its factorization.

22031222121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59705256 (or 59705253 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 22031222121 its reverse (12122213022), we get a palindrome (34153435143).

Subtracting from 22031222121 its reverse (12122213022), we obtain a palindrome (9909009099).

The spelling of 22031222121 in words is "twenty-two billion, thirty-one million, two hundred twenty-two thousand, one hundred twenty-one".