9601222001221 has 4 divisors (see below), whose sum is σ = 9603352296832. Its totient is φ = 9599091705612.

The previous prime is 9601222001213. The next prime is 9601222001227. The reversal of 9601222001221 is 1221002221069.

9601222001221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 a cyclic number.

It is not a de Polignac number, because 9601222001221 - 2³ = 9601222001213 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 9601222001221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9601222001227) 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, 1065141045 + ... + 1065150058.

It is an arithmetic number, because the mean of its divisors is an integer number (2400838074208).

Almost surely, 2^{9601222001221} is an apocalyptic number.

It is an amenable number.

9601222001221 is a deficient number, since it is larger than the sum of its proper divisors (2130295611).

9601222001221 is a wasteful number, since it uses less digits than its factorization.

9601222001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2130295610.

The product of its (nonzero) digits is 1728, while the sum is 28.

The spelling of 9601222001221 in words is "nine trillion, six hundred one billion, two hundred twenty-two million, one thousand, two hundred twenty-one".