21321224030 has 16 divisors (see below), whose sum is σ = 38918742624. Its totient is φ = 8408369760.

The previous prime is 21321224027. The next prime is 21321224081. The reversal of 21321224030 is 3042212312.

It is a junction number, because it is equal to n+sod(n) for n = 21321223993 and 21321224011.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15014237 + ... + 15015656.

It is an arithmetic number, because the mean of its divisors is an integer number (2432421414).

Almost surely, 2^21321224030 is an apocalyptic number.

21321224030 is a deficient number, since it is larger than the sum of its proper divisors (17597518594).

21321224030 is a wasteful number, since it uses less digits than its factorization.

21321224030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30029971.

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

Adding to 21321224030 its reverse (3042212312), we get a palindrome (24363436342).

The spelling of 21321224030 in words is "twenty-one billion, three hundred twenty-one million, two hundred twenty-four thousand, thirty".