21220300230 has 16 divisors (see below), whose sum is σ = 50928720624. Its totient is φ = 5658746720.

The previous prime is 21220300217. The next prime is 21220300247. The reversal of 21220300230 is 3200302212.

It is a super-2 number, since 2×21220300230² (a number of 21 digits) contains 22 as substring.

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, 353671641 + ... + 353671700.

It is an arithmetic number, because the mean of its divisors is an integer number (3183045039).

Almost surely, 2^21220300230 is an apocalyptic number.

21220300230 is an abundant number, since it is smaller than the sum of its proper divisors (29708420394).

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

21220300230 is a wasteful number, since it uses less digits than its factorization.

21220300230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707343351.

The product of its (nonzero) digits is 144, while the sum is 15.

Adding to 21220300230 its reverse (3200302212), we get a palindrome (24420602442).

The spelling of 21220300230 in words is "twenty-one billion, two hundred twenty million, three hundred thousand, two hundred thirty".