9100002012221 has 16 divisors (see below), whose sum is σ = 9661263445440. Its totient is φ = 8541628381440.

The previous prime is 9100002012163. The next prime is 9100002012259. The reversal of 9100002012221 is 1222102000019.

It is a happy number.

It is a de Polignac number, because none of the positive numbers 2^k-9100002012221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 9100002012193 and 9100002012202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9100002012271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 172201415 + ... + 172254251.

It is an arithmetic number, because the mean of its divisors is an integer number (603828965340).

Almost surely, 2^{9100002012221} is an apocalyptic number.

It is an amenable number.

9100002012221 is a deficient number, since it is larger than the sum of its proper divisors (561261433219).

9100002012221 is a wasteful number, since it uses less digits than its factorization.

9100002012221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79964.

The product of its (nonzero) digits is 144, while the sum is 20.

The spelling of 9100002012221 in words is "nine trillion, one hundred billion, two million, twelve thousand, two hundred twenty-one".