9122222021 has 4 divisors (see below), whose sum is σ = 9951514944. Its totient is φ = 8292929100.

The previous prime is 9122221967. The next prime is 9122222029. The reversal of 9122222021 is 1202222219.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1202222219 = 11 ⋅109292929.

It is a cyclic number.

It is not a de Polignac number, because 9122222021 - 2¹⁰ = 9122220997 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 (9122222029) 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 3 ways as a sum of consecutive naturals, for example, 414646445 + ... + 414646466.

It is an arithmetic number, because the mean of its divisors is an integer number (2487878736).

Almost surely, 2^9122222021 is an apocalyptic number.

It is an amenable number.

9122222021 is a deficient number, since it is larger than the sum of its proper divisors (829292923).

9122222021 is a wasteful number, since it uses less digits than its factorization.

9122222021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 829292922.

The product of its (nonzero) digits is 576, while the sum is 23.

The square root of 9122222021 is about 95510.3241592238. The cubic root of 9122222021 is about 2089.4575197450.

The spelling of 9122222021 in words is "nine billion, one hundred twenty-two million, two hundred twenty-two thousand, twenty-one".