11042420343989 has 2 divisors, whose sum is σ = 11042420343990. Its totient is φ = 11042420343988.

The previous prime is 11042420343907. The next prime is 11042420344099. The reversal of 11042420343989 is 98934302424011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8058018982225 + 2984401361764 = 2838665^2 + 1727542^2 .

It is a cyclic number.

It is not a de Polignac number, because 11042420343989 - 2²⁴ = 11042403566773 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11042420343089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5521210171994 + 5521210171995.

It is an arithmetic number, because the mean of its divisors is an integer number (5521210171995).

Almost surely, 2^{11042420343989} is an apocalyptic number.

It is an amenable number.

11042420343989 is a deficient number, since it is larger than the sum of its proper divisors (1).

11042420343989 is an equidigital number, since it uses as much as digits as its factorization.

11042420343989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1492992, while the sum is 50.

The spelling of 11042420343989 in words is "eleven trillion, forty-two billion, four hundred twenty million, three hundred forty-three thousand, nine hundred eighty-nine".