242211811 has 2 divisors, whose sum is σ = 242211812. Its totient is φ = 242211810.

The previous prime is 242211803. The next prime is 242211839. The reversal of 242211811 is 118112242.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 242211811 - 2³ = 242211803 is a prime.

It is a super-2 number, since 2×242211811² = 117333122775799442, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (242211311) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 121105905 + 121105906.

It is an arithmetic number, because the mean of its divisors is an integer number (121105906).

Almost surely, 2^242211811 is an apocalyptic number.

242211811 is a deficient number, since it is larger than the sum of its proper divisors (1).

242211811 is an equidigital number, since it uses as much as digits as its factorization.

242211811 is an evil number, because the sum of its binary digits is even.

The product of its digits is 256, while the sum is 22.

The square root of 242211811 is about 15563.1555604897. The cubic root of 242211811 is about 623.3497251036.

The spelling of 242211811 in words is "two hundred forty-two million, two hundred eleven thousand, eight hundred eleven".