9797122221 has 16 divisors (see below), whose sum is σ = 13502022720. Its totient is φ = 6315448320.

The previous prime is 9797122201. The next prime is 9797122243. The reversal of 9797122221 is 1222217979.

It is not a de Polignac number, because 9797122221 - 2⁵ = 9797122189 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9797122201) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442900 + ... + 464493.

It is an arithmetic number, because the mean of its divisors is an integer number (843876420).

Almost surely, 2^9797122221 is an apocalyptic number.

It is an amenable number.

9797122221 is a deficient number, since it is larger than the sum of its proper divisors (3704900499).

9797122221 is a wasteful number, since it uses less digits than its factorization.

9797122221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 907516.

The product of its digits is 63504, while the sum is 42.

The square root of 9797122221 is about 98980.4133200099. The cubic root of 9797122221 is about 2139.7654720857.

The spelling of 9797122221 in words is "nine billion, seven hundred ninety-seven million, one hundred twenty-two thousand, two hundred twenty-one".