21122220100111 has 8 divisors (see below), whose sum is σ = 23736006534240. Its totient is φ = 18649719419232.

The previous prime is 21122220100099. The next prime is 21122220100171. The reversal of 21122220100111 is 11100102222112.

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 21122220100111 - 2⁷ = 21122220099983 is a prime.

It is a super-3 number, since 3×21122220100111³ (a number of 41 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122220100171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35321437996 + ... + 35321438593.

It is an arithmetic number, because the mean of its divisors is an integer number (2967000816780).

Almost surely, 2^{21122220100111} is an apocalyptic number.

21122220100111 is a deficient number, since it is larger than the sum of its proper divisors (2613786434129).

21122220100111 is a wasteful number, since it uses less digits than its factorization.

21122220100111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70642876625.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 21122220100111 its reverse (11100102222112), we get a palindrome (32222322322223).

The spelling of 21122220100111 in words is "twenty-one trillion, one hundred twenty-two billion, two hundred twenty million, one hundred thousand, one hundred eleven".