9012211280 has 20 divisors (see below), whose sum is σ = 20953391412. Its totient is φ = 3604884480.

The previous prime is 9012211261. The next prime is 9012211301. The reversal of 9012211280 is 821122109.

It can be written as a sum of positive squares in 2 ways, for example, as 1339852816 + 7672358464 = 36604^2 + 87592^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 56326241 + ... + 56326400.

Almost surely, 2^9012211280 is an apocalyptic number.

It is an amenable number.

9012211280 is an abundant number, since it is smaller than the sum of its proper divisors (11941180132).

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

9012211280 is a wasteful number, since it uses less digits than its factorization.

9012211280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112652654 (or 112652648 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 26.

The square root of 9012211280 is about 94932.6670856771. The cubic root of 9012211280 is about 2081.0241566360.

Adding to 9012211280 its reverse (821122109), we get a palindrome (9833333389).

The spelling of 9012211280 in words is "nine billion, twelve million, two hundred eleven thousand, two hundred eighty".