1212288811 has 2 divisors, whose sum is σ = 1212288812. Its totient is φ = 1212288810.

The previous prime is 1212288797. The next prime is 1212288817. The reversal of 1212288811 is 1188822121.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1212288811 - 2²¹ = 1210191659 is a prime.

It is a super-2 number, since 2×1212288811² = 2939288322551587442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1212288817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 606144405 + 606144406.

It is an arithmetic number, because the mean of its divisors is an integer number (606144406).

Almost surely, 2^1212288811 is an apocalyptic number.

1212288811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1212288811 is an equidigital number, since it uses as much as digits as its factorization.

1212288811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4096, while the sum is 34.

The square root of 1212288811 is about 34817.9380635902. The cubic root of 1212288811 is about 1066.2737039581.

The spelling of 1212288811 in words is "one billion, two hundred twelve million, two hundred eighty-eight thousand, eight hundred eleven".