9122110021 has 8 divisors (see below), whose sum is σ = 9214652664. Its totient is φ = 9029611200.

The previous prime is 9122109991. The next prime is 9122110037. The reversal of 9122110021 is 1200112219.

It is a happy number.

9122110021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 6907936996 + 2214173025 = 83114^2 + 47055^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 9122110021 - 2¹⁵ = 9122077253 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9122140021) 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 7 ways as a sum of consecutive naturals, for example, 553131 + ... + 569383.

It is an arithmetic number, because the mean of its divisors is an integer number (1151831583).

Almost surely, 2^9122110021 is an apocalyptic number.

It is an amenable number.

9122110021 is a deficient number, since it is larger than the sum of its proper divisors (92542643).

9122110021 is a wasteful number, since it uses less digits than its factorization.

9122110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21911.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 9122110021 is about 95509.7378333749. The cubic root of 9122110021 is about 2089.4489684585.

The spelling of 9122110021 in words is "nine billion, one hundred twenty-two million, one hundred ten thousand, twenty-one".