1212041111 has 2 divisors, whose sum is σ = 1212041112. Its totient is φ = 1212041110.

The previous prime is 1212041063. The next prime is 1212041113. The reversal of 1212041111 is 1111402121.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212041111 - 2¹⁴ = 1212024727 is a prime.

It is a super-2 number, since 2×1212041111² = 2938087309508228642, which contains 22 as substring.

Together with 1212041113, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1212041113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606020555 + 606020556.

It is an arithmetic number, because the mean of its divisors is an integer number (606020556).

Almost surely, 2^1212041111 is an apocalyptic number.

1212041111 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212041111 is an equidigital number, since it uses as much as digits as its factorization.

1212041111 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16, while the sum is 14.

The square root of 1212041111 is about 34814.3808073618. The cubic root of 1212041111 is about 1066.2010771537.

Adding to 1212041111 its reverse (1111402121), we get a palindrome (2323443232).

The spelling of 1212041111 in words is "one billion, two hundred twelve million, forty-one thousand, one hundred eleven".