21003330122 has 4 divisors (see below), whose sum is σ = 31504995186. Its totient is φ = 10501665060.

The previous prime is 21003330077. The next prime is 21003330167. The reversal of 21003330122 is 22103330012.

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

It is an interprime number because it is at equal distance from previous prime (21003330077) and next prime (21003330167).

It can be written as a sum of positive squares in only one way, i.e., 18966522961 + 2036807161 = 137719^2 + 45131^2 .

It is a super-2 number, since 2×21003330122² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 21003330122.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 5250832529 + ... + 5250832532.

Almost surely, 2^21003330122 is an apocalyptic number.

21003330122 is a deficient number, since it is larger than the sum of its proper divisors (10501665064).

21003330122 is a wasteful number, since it uses less digits than its factorization.

21003330122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10501665063.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21003330122 its reverse (22103330012), we get a palindrome (43106660134).

The spelling of 21003330122 in words is "twenty-one billion, three million, three hundred thirty thousand, one hundred twenty-two".