1232131811 has 2 divisors, whose sum is σ = 1232131812. Its totient is φ = 1232131810.

The previous prime is 1232131801. The next prime is 1232131819. The reversal of 1232131811 is 1181312321.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1232131811 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1232131819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 616065905 + 616065906.

It is an arithmetic number, because the mean of its divisors is an integer number (616065906).

Almost surely, 2^1232131811 is an apocalyptic number.

1232131811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1232131811 is an equidigital number, since it uses as much as digits as its factorization.

1232131811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 288, while the sum is 23.

The square root of 1232131811 is about 35101.7351565418. The cubic root of 1232131811 is about 1072.0599124991.

The spelling of 1232131811 in words is "one billion, two hundred thirty-two million, one hundred thirty-one thousand, eight hundred eleven".