9001212100 has 72 divisors (see below), whose sum is σ = 19665060800. Its totient is φ = 3576182400.

The previous prime is 9001212091. The next prime is 9001212151. The reversal of 9001212100 is 12121009.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16637830 + ... + 16638370.

Almost surely, 2^9001212100 is an apocalyptic number.

It is an amenable number.

9001212100 is an abundant number, since it is smaller than the sum of its proper divisors (10663848700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

9001212100 is a wasteful number, since it uses less digits than its factorization.

9001212100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1373 (or 1366 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 9001212100 is about 94874.7179178942. The cubic root of 9001212100 is about 2080.1771992158.

Adding to 9001212100 its reverse (12121009), we get a palindrome (9013333109).

The spelling of 9001212100 in words is "nine billion, one million, two hundred twelve thousand, one hundred".