21459009122 has 4 divisors (see below), whose sum is σ = 32188513686. Its totient is φ = 10729504560.

The previous prime is 21459009097. The next prime is 21459009163. The reversal of 21459009122 is 22190095412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 21278348641 + 180660481 = 145871^2 + 13441^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5364752279 + ... + 5364752282.

Almost surely, 2^21459009122 is an apocalyptic number.

21459009122 is a deficient number, since it is larger than the sum of its proper divisors (10729504564).

21459009122 is a wasteful number, since it uses less digits than its factorization.

21459009122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10729504563.

The product of its (nonzero) digits is 12960, while the sum is 35.

The spelling of 21459009122 in words is "twenty-one billion, four hundred fifty-nine million, nine thousand, one hundred twenty-two".