1212112212211 has 4 divisors (see below), whose sum is σ = 1213997301832. Its totient is φ = 1210227122592.

The previous prime is 1212112212187. The next prime is 1212112212217. The reversal of 1212112212211 is 1122122112121.

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 1212112212211 - 2⁷ = 1212112212083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1212112212217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 942543846 + ... + 942545131.

It is an arithmetic number, because the mean of its divisors is an integer number (303499325458).

Almost surely, 2^{1212112212211} is an apocalyptic number.

1212112212211 is a deficient number, since it is larger than the sum of its proper divisors (1885089621).

1212112212211 is an equidigital number, since it uses as much as digits as its factorization.

1212112212211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1885089620.

The product of its digits is 64, while the sum is 19.

Adding to 1212112212211 its reverse (1122122112121), we get a palindrome (2334234324332).

The spelling of 1212112212211 in words is "one trillion, two hundred twelve billion, one hundred twelve million, two hundred twelve thousand, two hundred eleven".