21324444122 has 8 divisors (see below), whose sum is σ = 33868234836. Its totient is φ = 10035032512.

The previous prime is 21324444103. The next prime is 21324444131. The reversal of 21324444122 is 22144442312.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 21065909881 + 258534241 = 145141^2 + 16079^2 .

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

It is a super-2 number, since 2×21324444122² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 313594733 + ... + 313594800.

Almost surely, 2^21324444122 is an apocalyptic number.

21324444122 is a deficient number, since it is larger than the sum of its proper divisors (12543790714).

21324444122 is a wasteful number, since it uses less digits than its factorization.

21324444122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 627189552.

The product of its digits is 12288, while the sum is 29.

Adding to 21324444122 its reverse (22144442312), we get a palindrome (43468886434).

The spelling of 21324444122 in words is "twenty-one billion, three hundred twenty-four million, four hundred forty-four thousand, one hundred twenty-two".