12212111012121 has 12 divisors (see below), whose sum is σ = 17888162610240. Its totient is φ = 8026739631960.

The previous prime is 12212111012047. The next prime is 12212111012147. The reversal of 12212111012121 is 12121011121221.

It is a happy number.

12212111012121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 12212111012121 - 2⁹ = 12212111011609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 12212111012094 and 12212111012103.

It is not an unprimeable number, because it can be changed into a prime (12212111052121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9555641781 + ... + 9555643058.

It is an arithmetic number, because the mean of its divisors is an integer number (1490680217520).

Almost surely, 2^{12212111012121} is an apocalyptic number.

It is an amenable number.

12212111012121 is a deficient number, since it is larger than the sum of its proper divisors (5676051598119).

12212111012121 is a wasteful number, since it uses less digits than its factorization.

12212111012121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19111284916 (or 19111284913 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 12212111012121 its reverse (12121011121221), we get a palindrome (24333122133342).

The spelling of 12212111012121 in words is "twelve trillion, two hundred twelve billion, one hundred eleven million, twelve thousand, one hundred twenty-one".