12121200011 has 16 divisors (see below), whose sum is σ = 12591258624. Its totient is φ = 11661702624.

The previous prime is 12121199999. The next prime is 12121200023. The reversal of 12121200011 is 11000212121.

It is an interprime number because it is at equal distance from previous prime (12121199999) and next prime (12121200023).

It is a cyclic number.

It is not a de Polignac number, because 12121200011 - 2⁶ = 12121199947 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12121199965 and 12121200001.

It is not an unprimeable number, because it can be changed into a prime (12121200811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 784220 + ... + 799526.

It is an arithmetic number, because the mean of its divisors is an integer number (786953664).

Almost surely, 2^12121200011 is an apocalyptic number.

12121200011 is a deficient number, since it is larger than the sum of its proper divisors (470058613).

12121200011 is a wasteful number, since it uses less digits than its factorization.

12121200011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15650.

The product of its (nonzero) digits is 8, while the sum is 11.

Adding to 12121200011 its reverse (11000212121), we get a palindrome (23121412132).

The spelling of 12121200011 in words is "twelve billion, one hundred twenty-one million, two hundred thousand, eleven".