21122337 has 8 divisors (see below), whose sum is σ = 28290304. Its totient is φ = 14017968.

The previous prime is 21122323. The next prime is 21122351. The reversal of 21122337 is 73322112.

It is an interprime number because it is at equal distance from previous prime (21122323) and next prime (21122351).

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

It is not a de Polignac number, because 21122337 - 2¹⁵ = 21089569 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21126337) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15118 + ... + 16455.

It is an arithmetic number, because the mean of its divisors is an integer number (3536288).

Almost surely, 2^21122337 is an apocalyptic number.

It is an amenable number.

21122337 is a deficient number, since it is larger than the sum of its proper divisors (7167967).

21122337 is a wasteful number, since it uses less digits than its factorization.

21122337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31799.

The product of its digits is 504, while the sum is 21.

The square root of 21122337 is about 4595.9043723733. The cubic root of 21122337 is about 276.4271243163.

Adding to 21122337 its reverse (73322112), we get a palindrome (94444449).

The spelling of 21122337 in words is "twenty-one million, one hundred twenty-two thousand, three hundred thirty-seven".