21120202222 has 16 divisors (see below), whose sum is σ = 36334914912. Its totient is φ = 9019301760.

The previous prime is 21120202163. The next prime is 21120202237. The reversal of 21120202222 is 22220202112.

It is a junction number, because it is equal to n+sod(n) for n = 21120202196 and 21120202205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2680383 + ... + 2688250.

It is an arithmetic number, because the mean of its divisors is an integer number (2270932182).

Almost surely, 2^21120202222 is an apocalyptic number.

21120202222 is a deficient number, since it is larger than the sum of its proper divisors (15214712690).

21120202222 is a wasteful number, since it uses less digits than its factorization.

21120202222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5368923.

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21120202222 its reverse (22220202112), we get a palindrome (43340404334).

The spelling of 21120202222 in words is "twenty-one billion, one hundred twenty million, two hundred two thousand, two hundred twenty-two".