12212120011121 has 4 divisors (see below), whose sum is σ = 12214074894912. Its totient is φ = 12210165127332.

The previous prime is 12212120011061. The next prime is 12212120011193. The reversal of 12212120011121 is 12111002121221.

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 12212120011121 - 2³⁰ = 12211046269297 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12212120011121.

It is not an unprimeable number, because it can be changed into a prime (12212120011621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 977432525 + ... + 977445018.

It is an arithmetic number, because the mean of its divisors is an integer number (3053518723728).

Almost surely, 2^{12212120011121} is an apocalyptic number.

It is an amenable number.

12212120011121 is a deficient number, since it is larger than the sum of its proper divisors (1954883791).

12212120011121 is an equidigital number, since it uses as much as digits as its factorization.

12212120011121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954883790.

The product of its (nonzero) digits is 32, while the sum is 17.

Adding to 12212120011121 its reverse (12111002121221), we get a palindrome (24323122132342).

The spelling of 12212120011121 in words is "twelve trillion, two hundred twelve billion, one hundred twenty million, eleven thousand, one hundred twenty-one".