21102222112111 has 8 divisors (see below), whose sum is σ = 24116919765120. Its totient is φ = 18087548082648.

The previous prime is 21102222112067. The next prime is 21102222112187. The reversal of 21102222112111 is 11121122220112.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 21102222112111 - 2¹⁵ = 21102222079343 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21105222112111) 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, 3948481 + ... + 7602298.

It is an arithmetic number, because the mean of its divisors is an integer number (3014614970640).

Almost surely, 2^{21102222112111} is an apocalyptic number.

21102222112111 is a deficient number, since it is larger than the sum of its proper divisors (3014697653009).

21102222112111 is a wasteful number, since it uses less digits than its factorization.

21102222112111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11811773.

The product of its (nonzero) digits is 64, while the sum is 19.

Adding to 21102222112111 its reverse (11121122220112), we get a palindrome (32223344332223).

The spelling of 21102222112111 in words is "twenty-one trillion, one hundred two billion, two hundred twenty-two million, one hundred twelve thousand, one hundred eleven".