11842001681 has 2 divisors, whose sum is σ = 11842001682. Its totient is φ = 11842001680.

The previous prime is 11842001657. The next prime is 11842001683. The reversal of 11842001681 is 18610024811.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8876654656 + 2965347025 = 94216^2 + 54455^2 .

It is a cyclic number.

It is not a de Polignac number, because 11842001681 - 2¹⁴ = 11841985297 is a prime.

It is a super-2 number, since 2×11842001681² (a number of 21 digits) contains 22 as substring.

Together with 11842001683, 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 (11842001683) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5921000840 + 5921000841.

It is an arithmetic number, because the mean of its divisors is an integer number (5921000841).

Almost surely, 2^11842001681 is an apocalyptic number.

It is an amenable number.

11842001681 is a deficient number, since it is larger than the sum of its proper divisors (1).

11842001681 is an equidigital number, since it uses as much as digits as its factorization.

11842001681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 32.

The spelling of 11842001681 in words is "eleven billion, eight hundred forty-two million, one thousand, six hundred eighty-one".