21227104423 has 8 divisors (see below), whose sum is σ = 24268924448. Its totient is φ = 18187628544.

The previous prime is 21227104357. The next prime is 21227104427. The reversal of 21227104423 is 32440172212.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21227104423 - 2²⁵ = 21193549991 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21227104391 and 21227104400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21227104427) 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, 566586 + ... + 602887.

It is an arithmetic number, because the mean of its divisors is an integer number (3033615556).

Almost surely, 2^21227104423 is an apocalyptic number.

21227104423 is a deficient number, since it is larger than the sum of its proper divisors (3041820025).

21227104423 is a wasteful number, since it uses less digits than its factorization.

21227104423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1172073.

The product of its (nonzero) digits is 5376, while the sum is 28.

Adding to 21227104423 its reverse (32440172212), we get a palindrome (53667276635).

The spelling of 21227104423 in words is "twenty-one billion, two hundred twenty-seven million, one hundred four thousand, four hundred twenty-three".