9801137221 has 8 divisors (see below), whose sum is σ = 10156696920. Its totient is φ = 9446750208.

The previous prime is 9801137219. The next prime is 9801137233. The reversal of 9801137221 is 1227311089.

It can be written as a sum of positive squares in 4 ways, for example, as 2612640996 + 7188496225 = 51114^2 + 84785^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9801137221 - 2¹ = 9801137219 is a prime.

It is a super-3 number, since 3×9801137221³ (a number of 31 digits) contains 333 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 (9801132221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 276136 + ... + 309601.

It is an arithmetic number, because the mean of its divisors is an integer number (1269587115).

Almost surely, 2^9801137221 is an apocalyptic number.

It is an amenable number.

9801137221 is a deficient number, since it is larger than the sum of its proper divisors (355559699).

9801137221 is a wasteful number, since it uses less digits than its factorization.

9801137221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 586343.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 9801137221 is about 99000.6930329278. The cubic root of 9801137221 is about 2140.0577342709.

The spelling of 9801137221 in words is "nine billion, eight hundred one million, one hundred thirty-seven thousand, two hundred twenty-one".