21003321422 has 4 divisors (see below), whose sum is σ = 31504982136. Its totient is φ = 10501660710.

The previous prime is 21003321359. The next prime is 21003321431. The reversal of 21003321422 is 22412330012.

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

It is a super-2 number, since 2×21003321422² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21003321394 and 21003321403.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5250830354 + ... + 5250830357.

It is an arithmetic number, because the mean of its divisors is an integer number (7876245534).

Almost surely, 2^21003321422 is an apocalyptic number.

21003321422 is a deficient number, since it is larger than the sum of its proper divisors (10501660714).

21003321422 is a wasteful number, since it uses less digits than its factorization.

21003321422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10501660713.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21003321422 its reverse (22412330012), we get a palindrome (43415651434).

The spelling of 21003321422 in words is "twenty-one billion, three million, three hundred twenty-one thousand, four hundred twenty-two".