21330123222 has 16 divisors (see below), whose sum is σ = 43058941632. Its totient is φ = 7043591880.

The previous prime is 21330123179. The next prime is 21330123257. The reversal of 21330123222 is 22232103312.

It is a happy number.

It is a super-2 number, since 2×21330123222² (a number of 21 digits) contains 22 as substring.

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, 16611604 + ... + 16612887.

It is an arithmetic number, because the mean of its divisors is an integer number (2691183852).

Almost surely, 2^21330123222 is an apocalyptic number.

21330123222 is an abundant number, since it is smaller than the sum of its proper divisors (21728818410).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21330123222 is a wasteful number, since it uses less digits than its factorization.

21330123222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33224603.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21330123222 its reverse (22232103312), we get a palindrome (43562226534).

The spelling of 21330123222 in words is "twenty-one billion, three hundred thirty million, one hundred twenty-three thousand, two hundred twenty-two".