10221766771 has 2 divisors, whose sum is σ = 10221766772. Its totient is φ = 10221766770.

The previous prime is 10221766739. The next prime is 10221766781. The reversal of 10221766771 is 17766712201.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 10221766771 - 2⁵ = 10221766739 is a prime.

It is not a weakly prime, because it can be changed into another prime (10221766781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5110883385 + 5110883386.

It is an arithmetic number, because the mean of its divisors is an integer number (5110883386).

Almost surely, 2^10221766771 is an apocalyptic number.

10221766771 is a deficient number, since it is larger than the sum of its proper divisors (1).

10221766771 is an equidigital number, since it uses as much as digits as its factorization.

10221766771 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 49392, while the sum is 40.

The spelling of 10221766771 in words is "ten billion, two hundred twenty-one million, seven hundred sixty-six thousand, seven hundred seventy-one".