1212011210211 has 4 divisors (see below), whose sum is σ = 1616014946952. Its totient is φ = 808007473472.

The previous prime is 1212011210161. The next prime is 1212011210231. The reversal of 1212011210211 is 1120121102121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1212011210211 - 2⁹ = 1212011209699 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1212011210231) 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, 202001868366 + ... + 202001868371.

It is an arithmetic number, because the mean of its divisors is an integer number (404003736738).

Almost surely, 2^{1212011210211} is an apocalyptic number.

1212011210211 is a deficient number, since it is larger than the sum of its proper divisors (404003736741).

1212011210211 is an equidigital number, since it uses as much as digits as its factorization.

1212011210211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 404003736740.

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

Adding to 1212011210211 its reverse (1120121102121), we get a palindrome (2332132312332).

The spelling of 1212011210211 in words is "one trillion, two hundred twelve billion, eleven million, two hundred ten thousand, two hundred eleven".