9942122081 has 2 divisors, whose sum is σ = 9942122082. Its totient is φ = 9942122080.

The previous prime is 9942122059. The next prime is 9942122101. The reversal of 9942122081 is 1802212499.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 5920533025 + 4021589056 = 76945^2 + 63416^2 .

It is a cyclic number.

It is not a de Polignac number, because 9942122081 - 2²⁶ = 9875013217 is a prime.

It is a super-2 number, since 2×9942122081² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (9942122681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4971061040 + 4971061041.

It is an arithmetic number, because the mean of its divisors is an integer number (4971061041).

Almost surely, 2^9942122081 is an apocalyptic number.

It is an amenable number.

9942122081 is a deficient number, since it is larger than the sum of its proper divisors (1).

9942122081 is an equidigital number, since it uses as much as digits as its factorization.

9942122081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 20736, while the sum is 38.

The square root of 9942122081 is about 99710.1904571443. The cubic root of 9942122081 is about 2150.2701719975.

The spelling of 9942122081 in words is "nine billion, nine hundred forty-two million, one hundred twenty-two thousand, eighty-one".