12101110121 has 4 divisors (see below), whose sum is σ = 12491468544. Its totient is φ = 11710751700.

The previous prime is 12101110039. The next prime is 12101110207.

12101110121 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12101110121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12101110921) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195179165 + ... + 195179226.

It is an arithmetic number, because the mean of its divisors is an integer number (3122867136).

Almost surely, 2^12101110121 is an apocalyptic number.

It is an amenable number.

12101110121 is a deficient number, since it is larger than the sum of its proper divisors (390358423).

12101110121 is an equidigital number, since it uses as much as digits as its factorization.

12101110121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390358422.

The product of its (nonzero) digits is 4, while the sum is 11.

Multiplying 12101110121 by its sum of digits (11), we get a palindrome (133112211331).

The spelling of 12101110121 in words is "twelve billion, one hundred one million, one hundred ten thousand, one hundred twenty-one".