21211120222 has 4 divisors (see below), whose sum is σ = 31816680336. Its totient is φ = 10605560110.

The previous prime is 21211120207. The next prime is 21211120253. The reversal of 21211120222 is 22202111212.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 21211120196 and 21211120205.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5302780054 + ... + 5302780057.

It is an arithmetic number, because the mean of its divisors is an integer number (7954170084).

Almost surely, 2^21211120222 is an apocalyptic number.

21211120222 is a deficient number, since it is larger than the sum of its proper divisors (10605560114).

21211120222 is a wasteful number, since it uses less digits than its factorization.

21211120222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10605560113.

The product of its (nonzero) digits is 64, while the sum is 16.

Adding to 21211120222 its reverse (22202111212), we get a palindrome (43413231434).

The spelling of 21211120222 in words is "twenty-one billion, two hundred eleven million, one hundred twenty thousand, two hundred twenty-two".