1218058811 has 2 divisors, whose sum is σ = 1218058812. Its totient is φ = 1218058810.

The previous prime is 1218058799. The next prime is 1218058813. The reversal of 1218058811 is 1188508121.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1218058811 is a prime.

Together with 1218058813, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (1218058813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 609029405 + 609029406.

It is an arithmetic number, because the mean of its divisors is an integer number (609029406).

Almost surely, 2^1218058811 is an apocalyptic number.

1218058811 is a deficient number, since it is larger than the sum of its proper divisors (1).

1218058811 is an equidigital number, since it uses as much as digits as its factorization.

1218058811 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5120, while the sum is 35.

The square root of 1218058811 is about 34900.6992909884. The cubic root of 1218058811 is about 1067.9627030301.

The spelling of 1218058811 in words is "one billion, two hundred eighteen million, fifty-eight thousand, eight hundred eleven".