9001212101 has 4 divisors (see below), whose sum is σ = 10287099552. Its totient is φ = 7715324652.

The previous prime is 9001212091. The next prime is 9001212151. The reversal of 9001212101 is 1012121009.

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 9001212101 - 2¹⁰ = 9001211077 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 9001212101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9001212151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 642943715 + ... + 642943728.

It is an arithmetic number, because the mean of its divisors is an integer number (2571774888).

Almost surely, 2^9001212101 is an apocalyptic number.

It is an amenable number.

9001212101 is a deficient number, since it is larger than the sum of its proper divisors (1285887451).

9001212101 is a wasteful number, since it uses less digits than its factorization.

9001212101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1285887450.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 9001212101 is about 94874.7179231643. The cubic root of 9001212101 is about 2080.1771992928.

The spelling of 9001212101 in words is "nine billion, one million, two hundred twelve thousand, one hundred one".