21222969 has 8 divisors (see below), whose sum is σ = 28356000. Its totient is φ = 14119296.

The previous prime is 21222967. The next prime is 21222977. The reversal of 21222969 is 96922212.

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

It is not a de Polignac number, because 21222969 - 2¹ = 21222967 is a prime.

It is a super-2 number, since 2×21222969² = 900828826349922, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21222967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5592 + ... + 8585.

It is an arithmetic number, because the mean of its divisors is an integer number (3544500).

Almost surely, 2^21222969 is an apocalyptic number.

It is an amenable number.

21222969 is a deficient number, since it is larger than the sum of its proper divisors (7133031).

21222969 is a wasteful number, since it uses less digits than its factorization.

21222969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14679.

The product of its digits is 7776, while the sum is 33.

The square root of 21222969 is about 4606.8393720641. The cubic root of 21222969 is about 276.8654179041.

The spelling of 21222969 in words is "twenty-one million, two hundred twenty-two thousand, nine hundred sixty-nine".