21222111030111 has 12 divisors (see below), whose sum is σ = 30654206182600. Its totient is φ = 14148052878960.

The previous prime is 21222111030101. The next prime is 21222111030119. The reversal of 21222111030111 is 11103011122212.

It is a happy number.

21222111030111 is a `hidden beast` number, since 21 + 2 + 221 + 110 + 301 + 11 = 666.

It is not a de Polignac number, because 21222111030111 - 2²⁵ = 21222077475679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21222111030119) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6770865 + ... + 9396213.

Almost surely, 2^{21222111030111} is an apocalyptic number.

21222111030111 is a deficient number, since it is larger than the sum of its proper divisors (9432095152489).

21222111030111 is a wasteful number, since it uses less digits than its factorization.

21222111030111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3523526 (or 3523523 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 21222111030111 its reverse (11103011122212), we get a palindrome (32325122152323).

The spelling of 21222111030111 in words is "twenty-one trillion, two hundred twenty-two billion, one hundred eleven million, thirty thousand, one hundred eleven".