11420040021811 has 2 divisors, whose sum is σ = 11420040021812. Its totient is φ = 11420040021810.

The previous prime is 11420040021749. The next prime is 11420040021983. The reversal of 11420040021811 is 11812004002411.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 11420040021811 - 2³⁷ = 11282601068339 is a prime.

It is not a weakly prime, because it can be changed into another prime (11420040027811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5710020010905 + 5710020010906.

It is an arithmetic number, because the mean of its divisors is an integer number (5710020010906).

Almost surely, 2^{11420040021811} is an apocalyptic number.

11420040021811 is a deficient number, since it is larger than the sum of its proper divisors (1).

11420040021811 is an equidigital number, since it uses as much as digits as its factorization.

11420040021811 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 spelling of 11420040021811 in words is "eleven trillion, four hundred twenty billion, forty million, twenty-one thousand, eight hundred eleven".