21022404401 has 8 divisors (see below), whose sum is σ = 21567915360. Its totient is φ = 20483200192.

The previous prime is 21022404379. The next prime is 21022404407. The reversal of 21022404401 is 10440422012.

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 21022404401 - 2¹⁴ = 21022388017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21022404407) 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, 1569935 + ... + 1583268.

It is an arithmetic number, because the mean of its divisors is an integer number (2695989420).

Almost surely, 2^21022404401 is an apocalyptic number.

It is an amenable number.

21022404401 is a deficient number, since it is larger than the sum of its proper divisors (545510959).

21022404401 is a wasteful number, since it uses less digits than its factorization.

21022404401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3153375.

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 21022404401 its reverse (10440422012), we get a palindrome (31462826413).

The spelling of 21022404401 in words is "twenty-one billion, twenty-two million, four hundred four thousand, four hundred one".