21222720230 has 16 divisors (see below), whose sum is σ = 38207977344. Its totient is φ = 8487514560.

The previous prime is 21222720163. The next prime is 21222720251. The reversal of 21222720230 is 3202722212.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21222720196 and 21222720205.

It is a congruent number.

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 in 7 ways as a sum of consecutive naturals, for example, 139247 + ... + 248666.

It is an arithmetic number, because the mean of its divisors is an integer number (2387998584).

Almost surely, 2^21222720230 is an apocalyptic number.

21222720230 is a deficient number, since it is larger than the sum of its proper divisors (16985257114).

21222720230 is a wasteful number, since it uses less digits than its factorization.

21222720230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 393391.

The product of its (nonzero) digits is 1344, while the sum is 23.

The spelling of 21222720230 in words is "twenty-one billion, two hundred twenty-two million, seven hundred twenty thousand, two hundred thirty".