21101100012222 has 8 divisors (see below), whose sum is σ = 42202200024456. Its totient is φ = 7033700004072.

The previous prime is 21101100012193. The next prime is 21101100012271. The reversal of 21101100012222 is 22221000110112.

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

21101100012222 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1758425001013 + ... + 1758425001024.

It is an arithmetic number, because the mean of its divisors is an integer number (5275275003057).

Almost surely, 2^{21101100012222} is an apocalyptic number.

21101100012222 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.

21101100012222 is a wasteful number, since it uses less digits than its factorization.

21101100012222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3516850002042.

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

Adding to 21101100012222 its reverse (22221000110112), we get a palindrome (43322100122334).

The spelling of 21101100012222 in words is "twenty-one trillion, one hundred one billion, one hundred million, twelve thousand, two hundred twenty-two".