1112121211 has 2 divisors, whose sum is σ = 1112121212. Its totient is φ = 1112121210.

The previous prime is 1112121193. The next prime is 1112121217. The reversal of 1112121211 is 1121212111.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1112121211 - 2²³ = 1103732603 is a prime.

It is a super-2 number, since 2×1112121211² = 2473627175912213042, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1112121191 and 1112121200.

It is not a weakly prime, because it can be changed into another prime (1112121217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 556060605 + 556060606.

It is an arithmetic number, because the mean of its divisors is an integer number (556060606).

Almost surely, 2^1112121211 is an apocalyptic number.

1112121211 is a deficient number, since it is larger than the sum of its proper divisors (1).

1112121211 is an equidigital number, since it uses as much as digits as its factorization.

1112121211 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8, while the sum is 13.

The square root of 1112121211 is about 33348.4813897125. The cubic root of 1112121211 is about 1036.0579351107.

Adding to 1112121211 its reverse (1121212111), we get a palindrome (2233333322).

The spelling of 1112121211 in words is "one billion, one hundred twelve million, one hundred twenty-one thousand, two hundred eleven".