21022120110111 has 8 divisors (see below), whose sum is σ = 28090827165744. Its totient is φ = 13984079897280.

The previous prime is 21022120110091. The next prime is 21022120110143. The reversal of 21022120110111 is 11101102122012.

It is a happy number.

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

It is not a de Polignac number, because 21022120110111 - 2⁷ = 21022120109983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21022120110151) 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, 7666709100 + ... + 7666711841.

It is an arithmetic number, because the mean of its divisors is an integer number (3511353395718).

Almost surely, 2^{21022120110111} is an apocalyptic number.

21022120110111 is a deficient number, since it is larger than the sum of its proper divisors (7068707055633).

21022120110111 is a wasteful number, since it uses less digits than its factorization.

21022120110111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15333421401.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 21022120110111 its reverse (11101102122012), we get a palindrome (32123222232123).

The spelling of 21022120110111 in words is "twenty-one trillion, twenty-two billion, one hundred twenty million, one hundred ten thousand, one hundred eleven".