1212211121211 has 16 divisors (see below), whose sum is σ = 1873949560320. Its totient is φ = 773004192840.

The previous prime is 1212211121203. The next prime is 1212211121237. The reversal of 1212211121211 is 1121211122121.

It is a happy number.

1212211121211 is a `hidden beast` number, since 121 + 2 + 211 + 121 + 211 = 666.

It is not a de Polignac number, because 1212211121211 - 2³ = 1212211121203 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212211121711) 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, 976014775 + ... + 976016016.

It is an arithmetic number, because the mean of its divisors is an integer number (117121847520).

Almost surely, 2^{1212211121211} is an apocalyptic number.

1212211121211 is a deficient number, since it is larger than the sum of its proper divisors (661738439109).

1212211121211 is a wasteful number, since it uses less digits than its factorization.

1212211121211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1952030823 (or 1952030817 counting only the distinct ones).

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

Adding to 1212211121211 its reverse (1121211122121), we get a palindrome (2333422243332).

The spelling of 1212211121211 in words is "one trillion, two hundred twelve billion, two hundred eleven million, one hundred twenty-one thousand, two hundred eleven".