9121211022 has 128 divisors (see below), whose sum is σ = 24767078400. Its totient is φ = 2166998400.

The previous prime is 9121210951. The next prime is 9121211027. The reversal of 9121211022 is 2201121219.

9121211022 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 9121211022.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9121211027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 236647 + ... + 272477.

It is an arithmetic number, because the mean of its divisors is an integer number (193492800).

Almost surely, 2^9121211022 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 9121211022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12383539200).

9121211022 is an abundant number, since it is smaller than the sum of its proper divisors (15645867378).

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

9121211022 is a wasteful number, since it uses less digits than its factorization.

9121211022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35902.

The product of its (nonzero) digits is 144, while the sum is 21.

The square root of 9121211022 is about 95505.0313962568. The cubic root of 9121211022 is about 2089.3803266553.

The spelling of 9121211022 in words is "nine billion, one hundred twenty-one million, two hundred eleven thousand, twenty-two".