2112121221211 has 2 divisors, whose sum is σ = 2112121221212. Its totient is φ = 2112121221210.

The previous prime is 2112121221103. The next prime is 2112121221227. The reversal of 2112121221211 is 1121221212112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2112121221211 - 2¹¹ = 2112121219163 is a prime.

It is a super-2 number, since 2×2112121221211² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2112121221011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056060610605 + 1056060610606.

It is an arithmetic number, because the mean of its divisors is an integer number (1056060610606).

Almost surely, 2^{2112121221211} is an apocalyptic number.

2112121221211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112121221211 is an equidigital number, since it uses as much as digits as its factorization.

2112121221211 is an odious number, because the sum of its binary digits is odd.

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

Adding to 2112121221211 its reverse (1121221212112), we get a palindrome (3233342433323).

Subtracting from 2112121221211 its reverse (1121221212112), we obtain a palindrome (990900009099).

It can be divided in two parts, 2112121 and 221211, that added together give a palindrome (2333332).

The spelling of 2112121221211 in words is "two trillion, one hundred twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, two hundred eleven".