12011112101 has 4 divisors (see below), whose sum is σ = 12121305900. Its totient is φ = 11900918304.

The previous prime is 12011112079. The next prime is 12011112163. The reversal of 12011112101 is 10121111021.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8606272900 + 3404839201 = 92770^2 + 58351^2 .

It is a cyclic number.

It is not a de Polignac number, because 12011112101 - 2¹⁸ = 12010849957 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 (12011118101) 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, 55096736 + ... + 55096953.

It is an arithmetic number, because the mean of its divisors is an integer number (3030326475).

Almost surely, 2^12011112101 is an apocalyptic number.

It is an amenable number.

12011112101 is a deficient number, since it is larger than the sum of its proper divisors (110193799).

12011112101 is a wasteful number, since it uses less digits than its factorization.

12011112101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110193798.

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

Adding to 12011112101 its reverse (10121111021), we get a palindrome (22132223122).

The spelling of 12011112101 in words is "twelve billion, eleven million, one hundred twelve thousand, one hundred one".