21222202111 has 8 divisors (see below), whose sum is σ = 23152720464. Its totient is φ = 19291888320.

The previous prime is 21222202109. The next prime is 21222202151. The reversal of 21222202111 is 11120222212.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21222202111 - 2¹ = 21222202109 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 (21222202151) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 235825 + ... + 313141.

It is an arithmetic number, because the mean of its divisors is an integer number (2894090058).

Almost surely, 2^21222202111 is an apocalyptic number.

21222202111 is a deficient number, since it is larger than the sum of its proper divisors (1930518353).

21222202111 is a wasteful number, since it uses less digits than its factorization.

21222202111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 102281.

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

Adding to 21222202111 its reverse (11120222212), we get a palindrome (32342424323).

The spelling of 21222202111 in words is "twenty-one billion, two hundred twenty-two million, two hundred two thousand, one hundred eleven".