21130043222 has 32 divisors (see below), whose sum is σ = 34550651520. Its totient is φ = 9658353600.

The previous prime is 21130043149. The next prime is 21130043227. The reversal of 21130043222 is 22234003112.

It is a junction number, because it is equal to n+sod(n) for n = 21130043194 and 21130043203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21130043227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57722 + ... + 213522.

It is an arithmetic number, because the mean of its divisors is an integer number (1079707860).

Almost surely, 2^21130043222 is an apocalyptic number.

21130043222 is a deficient number, since it is larger than the sum of its proper divisors (13420608298).

21130043222 is a wasteful number, since it uses less digits than its factorization.

21130043222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155948.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 21130043222 its reverse (22234003112), we get a palindrome (43364046334).

The spelling of 21130043222 in words is "twenty-one billion, one hundred thirty million, forty-three thousand, two hundred twenty-two".