9123122740221 has 20 divisors (see below), whose sum is σ = 15575278329952. Its totient is φ = 5213212994088.

The previous prime is 9123122740219. The next prime is 9123122740241. The reversal of 9123122740221 is 1220472213219.

9123122740221 is a `hidden beast` number, since 9 + 1 + 2 + 3 + 1 + 227 + 402 + 21 = 666.

It is not a de Polignac number, because 9123122740221 - 2¹ = 9123122740219 is a prime.

It is a super-2 number, since 2×9123122740221² (a number of 27 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 (9123122740211) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 8045081215 + ... + 8045082348.

Almost surely, 2^{9123122740221} is an apocalyptic number.

It is an amenable number.

9123122740221 is a deficient number, since it is larger than the sum of its proper divisors (6452155589731).

9123122740221 is a wasteful number, since it uses less digits than its factorization.

9123122740221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16090163582 (or 16090163573 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 36.

The spelling of 9123122740221 in words is "nine trillion, one hundred twenty-three billion, one hundred twenty-two million, seven hundred forty thousand, two hundred twenty-one".