21220000230 has 64 divisors (see below), whose sum is σ = 59831509248. Its totient is φ = 4748530560.

The previous prime is 21220000201. The next prime is 21220000259. The reversal of 21220000230 is 3200002212.

It is an interprime number because it is at equal distance from previous prime (21220000201) and next prime (21220000259).

It is a super-2 number, since 2×21220000230² (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 31 ways as a sum of consecutive naturals, for example, 2468904 + ... + 2477483.

It is an arithmetic number, because the mean of its divisors is an integer number (934867332).

Almost surely, 2^21220000230 is an apocalyptic number.

21220000230 is an abundant number, since it is smaller than the sum of its proper divisors (38611509018).

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

21220000230 is a wasteful number, since it uses less digits than its factorization.

21220000230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4946421.

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 21220000230 its reverse (3200002212), we get a palindrome (24420002442).

The spelling of 21220000230 in words is "twenty-one billion, two hundred twenty million, two hundred thirty", and thus it is an aban number.