9412216521 has 8 divisors (see below), whose sum is σ = 12550496640. Its totient is φ = 6274373712.

The previous prime is 9412216477. The next prime is 9412216573. The reversal of 9412216521 is 1256122149.

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

It is not a de Polignac number, because 9412216521 - 2¹³ = 9412208329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (9412216921) 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, 55290 + ... + 147923.

It is an arithmetic number, because the mean of its divisors is an integer number (1568812080).

Almost surely, 2^9412216521 is an apocalyptic number.

It is an amenable number.

9412216521 is a deficient number, since it is larger than the sum of its proper divisors (3138280119).

9412216521 is a wasteful number, since it uses less digits than its factorization.

9412216521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218655.

The product of its digits is 8640, while the sum is 33.

The square root of 9412216521 is about 97016.5785884042. The cubic root of 9412216521 is about 2111.3681685351.

The spelling of 9412216521 in words is "nine billion, four hundred twelve million, two hundred sixteen thousand, five hundred twenty-one".