21220220030 has 16 divisors (see below), whose sum is σ = 38917083744. Its totient is φ = 8327935200.

The previous prime is 21220220023. The next prime is 21220220033. The reversal of 21220220030 is 3002202212.

21220220030 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×21220220030² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21220219987 and 21220220014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21220220033) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20018546 + ... + 20019605.

It is an arithmetic number, because the mean of its divisors is an integer number (2432317734).

Almost surely, 2^21220220030 is an apocalyptic number.

21220220030 is a deficient number, since it is larger than the sum of its proper divisors (17696863714).

21220220030 is a wasteful number, since it uses less digits than its factorization.

21220220030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40038211.

The product of its (nonzero) digits is 96, while the sum is 14.

Adding to 21220220030 its reverse (3002202212), we get a palindrome (24222422242).

It can be divided in two parts, 212202 and 20030, that added together give a palindrome (232232).

The spelling of 21220220030 in words is "twenty-one billion, two hundred twenty million, two hundred twenty thousand, thirty".