21001033332122 has 4 divisors (see below), whose sum is σ = 31501549998186. Its totient is φ = 10500516666060.

The previous prime is 21001033332119. The next prime is 21001033332187. The reversal of 21001033332122 is 22123333010012.

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., 10848136909801 + 10152896422321 = 3293651^2 + 3186361^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250258333029 + ... + 5250258333032.

Almost surely, 2^{21001033332122} is an apocalyptic number.

21001033332122 is a deficient number, since it is larger than the sum of its proper divisors (10500516666064).

21001033332122 is a wasteful number, since it uses less digits than its factorization.

21001033332122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10500516666063.

The product of its (nonzero) digits is 1296, while the sum is 23.

Adding to 21001033332122 its reverse (22123333010012), we get a palindrome (43124366342134).

The spelling of 21001033332122 in words is "twenty-one trillion, one billion, thirty-three million, three hundred thirty-two thousand, one hundred twenty-two".