21220112111101 has 8 divisors (see below), whose sum is σ = 21258222645600. Its totient is φ = 21182019727440.

The previous prime is 21220112111069. The next prime is 21220112111171. The reversal of 21220112111101 is 10111121102212.

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 21220112111101 - 2⁵ = 21220112111069 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 (21220112111171) 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, 2196331 + ... + 6874888.

It is an arithmetic number, because the mean of its divisors is an integer number (2657277830700).

Almost surely, 2^{21220112111101} is an apocalyptic number.

It is an amenable number.

21220112111101 is a deficient number, since it is larger than the sum of its proper divisors (38110534499).

21220112111101 is an equidigital number, since it uses as much as digits as its factorization.

21220112111101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9075419.

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

Adding to 21220112111101 its reverse (10111121102212), we get a palindrome (31331233213313).

The spelling of 21220112111101 in words is "twenty-one trillion, two hundred twenty billion, one hundred twelve million, one hundred eleven thousand, one hundred one".