9770010221 has 2 divisors, whose sum is σ = 9770010222. Its totient is φ = 9770010220.

The previous prime is 9770010209. The next prime is 9770010223. The reversal of 9770010221 is 1220100779.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9283322500 + 486687721 = 96350^2 + 22061^2 .

It is a cyclic number.

It is not a de Polignac number, because 9770010221 - 2¹⁸ = 9769748077 is a prime.

Together with 9770010223, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9770010223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4885005110 + 4885005111.

It is an arithmetic number, because the mean of its divisors is an integer number (4885005111).

Almost surely, 2^9770010221 is an apocalyptic number.

It is an amenable number.

9770010221 is a deficient number, since it is larger than the sum of its proper divisors (1).

9770010221 is an equidigital number, since it uses as much as digits as its factorization.

9770010221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1764, while the sum is 29.

The square root of 9770010221 is about 98843.3620482428. The cubic root of 9770010221 is about 2137.7898266920.

The spelling of 9770010221 in words is "nine billion, seven hundred seventy million, ten thousand, two hundred twenty-one".