12111122001 has 16 divisors (see below), whose sum is σ = 17620505280. Its totient is φ = 7338270720.

The previous prime is 12111121973. The next prime is 12111122011. The reversal of 12111122001 is 10022111121.

It is not a de Polignac number, because 12111122001 - 2⁹ = 12111121489 is a prime.

It is a super-2 number, since 2×12111122001² (a number of 21 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (12111122011) 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, 98065 + ... + 183953.

It is an arithmetic number, because the mean of its divisors is an integer number (1101281580).

Almost surely, 2^12111122001 is an apocalyptic number.

12111122001 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12111122001 is a deficient number, since it is larger than the sum of its proper divisors (5509383279).

12111122001 is a wasteful number, since it uses less digits than its factorization.

12111122001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90176.

The product of its (nonzero) digits is 8, while the sum is 12.

Adding to 12111122001 its reverse (10022111121), we get a palindrome (22133233122).

The spelling of 12111122001 in words is "twelve billion, one hundred eleven million, one hundred twenty-two thousand, one".