21101100212222 has 8 divisors (see below), whose sum is σ = 31652624942400. Its totient is φ = 10550225231424.

The previous prime is 21101100212219. The next prime is 21101100212251. The reversal of 21101100212222 is 22221200110112.

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

It is a self number, because there is not a number n which added to its sum of digits gives 21101100212222.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162356147 + ... + 162486062.

It is an arithmetic number, because the mean of its divisors is an integer number (3956578117800).

Almost surely, 2^{21101100212222} is an apocalyptic number.

21101100212222 is a deficient number, since it is larger than the sum of its proper divisors (10551524730178).

21101100212222 is a wasteful number, since it uses less digits than its factorization.

21101100212222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324874690.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 21101100212222 its reverse (22221200110112), we get a palindrome (43322300322334).

The spelling of 21101100212222 in words is "twenty-one trillion, one hundred one billion, one hundred million, two hundred twelve thousand, two hundred twenty-two".