12111100001 has 64 divisors (see below), whose sum is σ = 16487116800. Its totient is φ = 8591235840.

The previous prime is 12111099971. The next prime is 12111100039. The reversal of 12111100001 is 10000111121.

It is a happy number.

It is not a de Polignac number, because 12111100001 - 2¹⁰ = 12111098977 is a prime.

It is not an unprimeable number, because it can be changed into a prime (12111100051) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 32469251 + ... + 32469623.

It is an arithmetic number, because the mean of its divisors is an integer number (257611200).

Almost surely, 2^12111100001 is an apocalyptic number.

12111100001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12111100001 is a deficient number, since it is larger than the sum of its proper divisors (4376016799).

12111100001 is a wasteful number, since it uses less digits than its factorization.

12111100001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766.

The product of its (nonzero) digits is 2, while the sum is 8.

Adding to 12111100001 its reverse (10000111121), we get a palindrome (22111211122).

The spelling of 12111100001 in words is "twelve billion, one hundred eleven million, one hundred thousand, one".