9112221112021 has 4 divisors (see below), whose sum is σ = 9112397085612. Its totient is φ = 9112045138432.

The previous prime is 9112221112009. The next prime is 9112221112079. The reversal of 9112221112021 is 1202111222119.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4371085029796 + 4741136082225 = 2090714^2 + 2177415^2 .

It is a cyclic number.

It is not a de Polignac number, because 9112221112021 - 2⁵ = 9112221111989 is a prime.

It is a super-2 number, since 2×9112221112021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (9112221112121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 87909100 + ... + 88012693.

It is an arithmetic number, because the mean of its divisors is an integer number (2278099271403).

Almost surely, 2^{9112221112021} is an apocalyptic number.

It is an amenable number.

9112221112021 is a deficient number, since it is larger than the sum of its proper divisors (175973591).

9112221112021 is a wasteful number, since it uses less digits than its factorization.

9112221112021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 175973590.

The product of its (nonzero) digits is 288, while the sum is 25.

The spelling of 9112221112021 in words is "nine trillion, one hundred twelve billion, two hundred twenty-one million, one hundred twelve thousand, twenty-one".