9001201321 has 4 divisors (see below), whose sum is σ = 10287087232. Its totient is φ = 7715315412.

The previous prime is 9001201289. The next prime is 9001201333. The reversal of 9001201321 is 1231021009.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 9001201321 - 2⁵ = 9001201289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (9001201351) 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, 642942945 + ... + 642942958.

It is an arithmetic number, because the mean of its divisors is an integer number (2571771808).

Almost surely, 2^9001201321 is an apocalyptic number.

It is an amenable number.

9001201321 is a deficient number, since it is larger than the sum of its proper divisors (1285885911).

9001201321 is a wasteful number, since it uses less digits than its factorization.

9001201321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285885910.

The product of its (nonzero) digits is 108, while the sum is 19.

The square root of 9001201321 is about 94874.6611113842. The cubic root of 9001201321 is about 2080.1763688743.

The spelling of 9001201321 in words is "nine billion, one million, two hundred one thousand, three hundred twenty-one".