9910921771 has 2 divisors, whose sum is σ = 9910921772. Its totient is φ = 9910921770.

The previous prime is 9910921753. The next prime is 9910921793. The reversal of 9910921771 is 1771290199.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9910921771 - 2⁵ = 9910921739 is a prime.

It is not a weakly prime, because it can be changed into another prime (9910921751) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4955460885 + 4955460886.

It is an arithmetic number, because the mean of its divisors is an integer number (4955460886).

Almost surely, 2^9910921771 is an apocalyptic number.

9910921771 is a deficient number, since it is larger than the sum of its proper divisors (1).

9910921771 is an equidigital number, since it uses as much as digits as its factorization.

9910921771 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 71442, while the sum is 46.

The square root of 9910921771 is about 99553.6125462055. The cubic root of 9910921771 is about 2148.0184931457.

The spelling of 9910921771 in words is "nine billion, nine hundred ten million, nine hundred twenty-one thousand, seven hundred seventy-one".