1212811 has 2 divisors, whose sum is σ = 1212812. Its totient is φ = 1212810.

The previous prime is 1212793. The next prime is 1212817. The reversal of 1212811 is 1182121.

It is a strong prime.

It is an emirp because it is prime and its reverse (1182121) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1212811 - 2⁷ = 1212683 is a prime.

It is not a weakly prime, because it can be changed into another prime (1212817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606405 + 606406.

It is an arithmetic number, because the mean of its divisors is an integer number (606406).

2^1212811 is an apocalyptic number.

1212811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212811 is an equidigital number, since it uses as much as digits as its factorization.

1212811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32, while the sum is 16.

The square root of 1212811 is about 1101.2769860485. The cubic root of 1212811 is about 106.6426779822.

Adding to 1212811 its reverse (1182121), we get a palindrome (2394932).

The spelling of 1212811 in words is "one million, two hundred twelve thousand, eight hundred eleven".