21227104430 has 32 divisors (see below), whose sum is σ = 43740172800. Its totient is φ = 7265700000.

The previous prime is 21227104427. The next prime is 21227104433. The reversal of 21227104430 is 3440172212.

It is an interprime number because it is at equal distance from previous prime (21227104427) and next prime (21227104433).

It is a self number, because there is not a number n which added to its sum of digits gives 21227104430.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21227104433) 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, 211196 + ... + 295055.

It is an arithmetic number, because the mean of its divisors is an integer number (1366880400).

Almost surely, 2^21227104430 is an apocalyptic number.

21227104430 is an abundant number, since it is smaller than the sum of its proper divisors (22513068370).

21227104430 is a wasteful number, since it uses less digits than its factorization.

21227104430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 506864.

The product of its (nonzero) digits is 2688, while the sum is 26.

Adding to 21227104430 its reverse (3440172212), we get a palindrome (24667276642).

The spelling of 21227104430 in words is "twenty-one billion, two hundred twenty-seven million, one hundred four thousand, four hundred thirty".