21220211230 has 16 divisors (see below), whose sum is σ = 38224063584. Its totient is φ = 8481932640.

The previous prime is 21220211227. The next prime is 21220211269. The reversal of 21220211230 is 3211202212.

It is a happy number.

It is a super-2 number, since 2×21220211230² (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, 754482 + ... + 782101.

It is an arithmetic number, because the mean of its divisors is an integer number (2389003974).

Almost surely, 2^21220211230 is an apocalyptic number.

21220211230 is a deficient number, since it is larger than the sum of its proper divisors (17003852354).

21220211230 is a wasteful number, since it uses less digits than its factorization.

21220211230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1537971.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21220211230 its reverse (3211202212), we get a palindrome (24431413442).

The spelling of 21220211230 in words is "twenty-one billion, two hundred twenty million, two hundred eleven thousand, two hundred thirty".