21110222211 has 8 divisors (see below), whose sum is σ = 30312114000. Its totient is φ = 12990905952.

The previous prime is 21110222197. The next prime is 21110222219. The reversal of 21110222211 is 11222201112.

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

It is not a de Polignac number, because 21110222211 - 2⁷ = 21110222083 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21110222219) 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, 270643836 + ... + 270643913.

It is an arithmetic number, because the mean of its divisors is an integer number (3789014250).

Almost surely, 2^21110222211 is an apocalyptic number.

21110222211 is a deficient number, since it is larger than the sum of its proper divisors (9201891789).

21110222211 is a wasteful number, since it uses less digits than its factorization.

21110222211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541287765.

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

Adding to 21110222211 its reverse (11222201112), we get a palindrome (32332423323).

The spelling of 21110222211 in words is "twenty-one billion, one hundred ten million, two hundred twenty-two thousand, two hundred eleven".