9042012221 has 16 divisors (see below), whose sum is σ = 9909043200. Its totient is φ = 8182577520.

The previous prime is 9042012211. The next prime is 9042012247. The reversal of 9042012221 is 1222102409.

It is a cyclic number.

It is not a de Polignac number, because 9042012221 - 2⁶ = 9042012157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9042012211) 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, 2521796 + ... + 2525378.

It is an arithmetic number, because the mean of its divisors is an integer number (619315200).

Almost surely, 2^9042012221 is an apocalyptic number.

It is an amenable number.

9042012221 is a deficient number, since it is larger than the sum of its proper divisors (867030979).

9042012221 is a wasteful number, since it uses less digits than its factorization.

9042012221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4576.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 9042012221 is about 95089.4958499623. The cubic root of 9042012221 is about 2083.3154273078.

The spelling of 9042012221 in words is "nine billion, forty-two million, twelve thousand, two hundred twenty-one".