12012100011 has 10 divisors (see below), whose sum is σ = 17944001372. Its totient is φ = 8008066620.

The previous prime is 12012099973. The next prime is 12012100013. The reversal of 12012100011 is 11000121021.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-12012100011 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12012099966 and 12012100002.

It is not an unprimeable number, because it can be changed into a prime (12012100013) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 74148685 + ... + 74148846.

Almost surely, 2^12012100011 is an apocalyptic number.

12012100011 is a deficient number, since it is larger than the sum of its proper divisors (5931901361).

12012100011 is an equidigital number, since it uses as much as digits as its factorization.

12012100011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148297543 (or 148297534 counting only the distinct ones).

The product of its (nonzero) digits is 4, while the sum is 9.

Adding to 12012100011 its reverse (11000121021), we get a palindrome (23012221032).

The spelling of 12012100011 in words is "twelve billion, twelve million, one hundred thousand, eleven".