21224274771 has 8 divisors (see below), whose sum is σ = 32341752064. Its totient is φ = 12128157000.

The previous prime is 21224274727. The next prime is 21224274817. The reversal of 21224274771 is 17747242212.

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

It is not a de Polignac number, because 21224274771 - 2²³ = 21215886163 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21224274571) 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, 505339855 + ... + 505339896.

It is an arithmetic number, because the mean of its divisors is an integer number (4042719008).

Almost surely, 2^21224274771 is an apocalyptic number.

21224274771 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

21224274771 is a deficient number, since it is larger than the sum of its proper divisors (11117477293).

21224274771 is a wasteful number, since it uses less digits than its factorization.

21224274771 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1010679761.

The product of its digits is 87808, while the sum is 39.

The spelling of 21224274771 in words is "twenty-one billion, two hundred twenty-four million, two hundred seventy-four thousand, seven hundred seventy-one".