21220002110222 has 16 divisors (see below), whose sum is σ = 32551570725120. Its totient is φ = 10372050968832.

The previous prime is 21220002110207. The next prime is 21220002110249. The reversal of 21220002110222 is 22201120002212.

It is a happy number.

It is a super-2 number, since 2×21220002110222² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21220002110222.

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, 643091822 + ... + 643124817.

It is an arithmetic number, because the mean of its divisors is an integer number (2034473170320).

Almost surely, 2^{21220002110222} is an apocalyptic number.

21220002110222 is a deficient number, since it is larger than the sum of its proper divisors (11331568614898).

21220002110222 is a wasteful number, since it uses less digits than its factorization.

21220002110222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1286216827.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21220002110222 its reverse (22201120002212), we get a palindrome (43421122112434).

The spelling of 21220002110222 in words is "twenty-one trillion, two hundred twenty billion, two million, one hundred ten thousand, two hundred twenty-two".