400321230811 has 2 divisors, whose sum is σ = 400321230812. Its totient is φ = 400321230810.

The previous prime is 400321230761. The next prime is 400321230823. The reversal of 400321230811 is 118032123004.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400321230811 is a prime.

It is not a weakly prime, because it can be changed into another prime (400321230871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200160615405 + 200160615406.

It is an arithmetic number, because the mean of its divisors is an integer number (200160615406).

Almost surely, 2^400321230811 is an apocalyptic number.

400321230811 is a deficient number, since it is larger than the sum of its proper divisors (1).

400321230811 is an equidigital number, since it uses as much as digits as its factorization.

400321230811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 400321230811 its reverse (118032123004), we get a palindrome (518353353815).

The spelling of 400321230811 in words is "four hundred billion, three hundred twenty-one million, two hundred thirty thousand, eight hundred eleven".