21220012230 has 16 divisors (see below), whose sum is σ = 50928029424. Its totient is φ = 5658669920.

The previous prime is 21220012223. The next prime is 21220012241. The reversal of 21220012230 is 3221002212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (15).

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, 353666841 + ... + 353666900.

It is an arithmetic number, because the mean of its divisors is an integer number (3183001839).

Almost surely, 2^21220012230 is an apocalyptic number.

21220012230 is an abundant number, since it is smaller than the sum of its proper divisors (29708017194).

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

21220012230 is a wasteful number, since it uses less digits than its factorization.

21220012230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707333751.

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 21220012230 its reverse (3221002212), we get a palindrome (24441014442).

The spelling of 21220012230 in words is "twenty-one billion, two hundred twenty million, twelve thousand, two hundred thirty".