1200228811 has 2 divisors, whose sum is σ = 1200228812. Its totient is φ = 1200228810.

The previous prime is 1200228791. The next prime is 1200228859. The reversal of 1200228811 is 1188220021.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1200228811 - 2⁵ = 1200228779 is a prime.

It is not a weakly prime, because it can be changed into another prime (1200228871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 600114405 + 600114406.

It is an arithmetic number, because the mean of its divisors is an integer number (600114406).

Almost surely, 2^1200228811 is an apocalyptic number.

1200228811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1200228811 is an equidigital number, since it uses as much as digits as its factorization.

1200228811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 512, while the sum is 25.

The square root of 1200228811 is about 34644.3185962720. The cubic root of 1200228811 is about 1062.7261059930.

Adding to 1200228811 its reverse (1188220021), we get a palindrome (2388448832).

The spelling of 1200228811 in words is "one billion, two hundred million, two hundred twenty-eight thousand, eight hundred eleven".