12100120011 has 16 divisors (see below), whose sum is σ = 20486976000. Its totient is φ = 6914354184.

The previous prime is 12100120009. The next prime is 12100120031. The reversal of 12100120011 is 11002100121.

It is a happy number.

It is not a de Polignac number, because 12100120011 - 2¹ = 12100120009 is a prime.

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

It is a junction number, because it is equal to n+sod(n) for n = 12100119975 and 12100120002.

It is not an unprimeable number, because it can be changed into a prime (12100120001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 32010711 + ... + 32011088.

It is an arithmetic number, because the mean of its divisors is an integer number (1280436000).

Almost surely, 2^12100120011 is an apocalyptic number.

12100120011 is a deficient number, since it is larger than the sum of its proper divisors (8386855989).

12100120011 is an equidigital number, since it uses as much as digits as its factorization.

12100120011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64021815 (or 64021809 counting only the distinct ones).

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

Adding to 12100120011 its reverse (11002100121), we get a palindrome (23102220132).

The spelling of 12100120011 in words is "twelve billion, one hundred million, one hundred twenty thousand, eleven".