21112101100121 has 8 divisors (see below), whose sum is σ = 21178872951744. Its totient is φ = 21045330331920.

The previous prime is 21112101100117. The next prime is 21112101100141. The reversal of 21112101100121 is 12100110121112.

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 21112101100121 - 2² = 21112101100117 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21112101100096 and 21112101100105.

It is not an unprimeable number, because it can be changed into a prime (21112101100141) 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, 59731406 + ... + 60083816.

It is an arithmetic number, because the mean of its divisors is an integer number (2647359118968).

Almost surely, 2^{21112101100121} is an apocalyptic number.

It is an amenable number.

21112101100121 is a deficient number, since it is larger than the sum of its proper divisors (66771851623).

21112101100121 is a wasteful number, since it uses less digits than its factorization.

21112101100121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 541711.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 21112101100121 its reverse (12100110121112), we get a palindrome (33212211221233).

The spelling of 21112101100121 in words is "twenty-one trillion, one hundred twelve billion, one hundred one million, one hundred thousand, one hundred twenty-one".