12111012101 has 4 divisors (see below), whose sum is σ = 12118522092. Its totient is φ = 12103502112.

The previous prime is 12111012077. The next prime is 12111012113. The reversal of 12111012101 is 10121011121.

12111012101 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10121011121 = 13 ⋅778539317.

It can be written as a sum of positive squares in 2 ways, for example, as 6456122500 + 5654889601 = 80350^2 + 75199^2 .

It is a cyclic number.

It is not a de Polignac number, because 12111012101 - 2²⁶ = 12043903237 is a prime.

It is a super-2 number, since 2×12111012101² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12111012701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3752576 + ... + 3755801.

It is an arithmetic number, because the mean of its divisors is an integer number (3029630523).

Almost surely, 2^12111012101 is an apocalyptic number.

It is an amenable number.

12111012101 is a deficient number, since it is larger than the sum of its proper divisors (7509991).

12111012101 is an equidigital number, since it uses as much as digits as its factorization.

12111012101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7509990.

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

Adding to 12111012101 its reverse (10121011121), we get a palindrome (22232023222).

The spelling of 12111012101 in words is "twelve billion, one hundred eleven million, twelve thousand, one hundred one".