21251005322 has 8 divisors (see below), whose sum is σ = 32158601316. Its totient is φ = 10531471552.

The previous prime is 21251005309. The next prime is 21251005327. The reversal of 21251005322 is 22350015212.

It can be written as a sum of positive squares in 2 ways, for example, as 12227715241 + 9023290081 = 110579^2 + 94991^2 .

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

It is not an unprimeable number, because it can be changed into a prime (21251005327) 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 3 ways as a sum of consecutive naturals, for example, 47015273 + ... + 47015724.

Almost surely, 2^21251005322 is an apocalyptic number.

21251005322 is a deficient number, since it is larger than the sum of its proper divisors (10907595994).

21251005322 is a wasteful number, since it uses less digits than its factorization.

21251005322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 94031112.

The product of its (nonzero) digits is 1200, while the sum is 23.

The spelling of 21251005322 in words is "twenty-one billion, two hundred fifty-one million, five thousand, three hundred twenty-two".