12121200211101 has 4 divisors (see below), whose sum is σ = 16161600281472. Its totient is φ = 8080800140732.

The previous prime is 12121200211097. The next prime is 12121200211103. The reversal of 12121200211101 is 10111200212121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 12121200211101 - 2² = 12121200211097 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12121200211103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2020200035181 + ... + 2020200035186.

It is an arithmetic number, because the mean of its divisors is an integer number (4040400070368).

Almost surely, 2^{12121200211101} is an apocalyptic number.

It is an amenable number.

12121200211101 is a deficient number, since it is larger than the sum of its proper divisors (4040400070371).

12121200211101 is an equidigital number, since it uses as much as digits as its factorization.

12121200211101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4040400070370.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 12121200211101 its reverse (10111200212121), we get a palindrome (22232400423222).

The spelling of 12121200211101 in words is "twelve trillion, one hundred twenty-one billion, two hundred million, two hundred eleven thousand, one hundred one".