21102111222 has 8 divisors (see below), whose sum is σ = 42204222456. Its totient is φ = 7034037072.

The previous prime is 21102111187. The next prime is 21102111223. The reversal of 21102111222 is 22211120112.

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

21102111222 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21102111223) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1758509263 + ... + 1758509274.

It is an arithmetic number, because the mean of its divisors is an integer number (5275527807).

Almost surely, 2^21102111222 is an apocalyptic number.

21102111222 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21102111222 is a wasteful number, since it uses less digits than its factorization.

21102111222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3517018542.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 21102111222 its reverse (22211120112), we get a palindrome (43313231334).

The spelling of 21102111222 in words is "twenty-one billion, one hundred two million, one hundred eleven thousand, two hundred twenty-two".