21230015222 has 8 divisors (see below), whose sum is σ = 34294640016. Its totient is φ = 9798468552.

The previous prime is 21230015189. The next prime is 21230015321. The reversal of 21230015222 is 22251003212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 21230015194 and 21230015203.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 408269498 + ... + 408269549.

It is an arithmetic number, because the mean of its divisors is an integer number (4286830002).

Almost surely, 2^21230015222 is an apocalyptic number.

21230015222 is a deficient number, since it is larger than the sum of its proper divisors (13064624794).

21230015222 is a wasteful number, since it uses less digits than its factorization.

21230015222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 816539062.

The product of its (nonzero) digits is 480, while the sum is 20.

Adding to 21230015222 its reverse (22251003212), we get a palindrome (43481018434).

The spelling of 21230015222 in words is "twenty-one billion, two hundred thirty million, fifteen thousand, two hundred twenty-two".