21003102422 has 4 divisors (see below), whose sum is σ = 31504653636. Its totient is φ = 10501551210.

The previous prime is 21003102397. The next prime is 21003102451. The reversal of 21003102422 is 22420130012.

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

It is a super-2 number, since 2×21003102422² (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 21003102422.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250775604 + ... + 5250775607.

It is an arithmetic number, because the mean of its divisors is an integer number (7876163409).

Almost surely, 2^21003102422 is an apocalyptic number.

21003102422 is a deficient number, since it is larger than the sum of its proper divisors (10501551214).

21003102422 is a wasteful number, since it uses less digits than its factorization.

21003102422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10501551213.

The product of its (nonzero) digits is 192, while the sum is 17.

Adding to 21003102422 its reverse (22420130012), we get a palindrome (43423232434).

The spelling of 21003102422 in words is "twenty-one billion, three million, one hundred two thousand, four hundred twenty-two".