21042222224011 has 16 divisors (see below), whose sum is σ = 22585653913824. Its totient is φ = 19532762855424.

The previous prime is 21042222224003. The next prime is 21042222224027. The reversal of 21042222224011 is 11042222224012.

It is a cyclic number.

It is not a de Polignac number, because 21042222224011 - 2³ = 21042222224003 is a prime.

It is a super-2 number, since 2×21042222224011² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21042222224041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 76378836 + ... + 76653838.

It is an arithmetic number, because the mean of its divisors is an integer number (1411603369614).

Almost surely, 2^{21042222224011} is an apocalyptic number.

21042222224011 is a deficient number, since it is larger than the sum of its proper divisors (1543431689813).

21042222224011 is a wasteful number, since it uses less digits than its factorization.

21042222224011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 336750.

The product of its (nonzero) digits is 2048, while the sum is 25.

Adding to 21042222224011 its reverse (11042222224012), we get a palindrome (32084444448023).

Subtracting from 21042222224011 its reverse (11042222224012), we obtain a palindrome (9999999999999).

The spelling of 21042222224011 in words is "twenty-one trillion, forty-two billion, two hundred twenty-two million, two hundred twenty-four thousand, eleven".