9801962221 has 4 divisors (see below), whose sum is σ = 10378548252. Its totient is φ = 9225376192.

The previous prime is 9801962173. The next prime is 9801962237. The reversal of 9801962221 is 1222691089.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8429259721 + 1372702500 = 91811^2 + 37050^2 .

It is a cyclic number.

It is not a de Polignac number, because 9801962221 - 2¹¹ = 9801960173 is a prime.

It is a super-2 number, since 2×9801962221² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9801962281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 288292990 + ... + 288293023.

It is an arithmetic number, because the mean of its divisors is an integer number (2594637063).

Almost surely, 2^9801962221 is an apocalyptic number.

It is an amenable number.

9801962221 is a deficient number, since it is larger than the sum of its proper divisors (576586031).

9801962221 is a wasteful number, since it uses less digits than its factorization.

9801962221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 576586030.

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 9801962221 is about 99004.8595827498. The cubic root of 9801962221 is about 2140.1177782588.

The spelling of 9801962221 in words is "nine billion, eight hundred one million, nine hundred sixty-two thousand, two hundred twenty-one".