21223332401 has 8 divisors (see below), whose sum is σ = 21625639200. Its totient is φ = 20824666720.

The previous prime is 21223332391. The next prime is 21223332433. The reversal of 21223332401 is 10423332212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-21223332401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (21223332451) 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, 898511 + ... + 921828.

It is an arithmetic number, because the mean of its divisors is an integer number (2703204900).

Almost surely, 2^21223332401 is an apocalyptic number.

It is an amenable number.

21223332401 is a deficient number, since it is larger than the sum of its proper divisors (402306799).

21223332401 is a wasteful number, since it uses less digits than its factorization.

21223332401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1820559.

The product of its (nonzero) digits is 1728, while the sum is 23.

Adding to 21223332401 its reverse (10423332212), we get a palindrome (31646664613).

The spelling of 21223332401 in words is "twenty-one billion, two hundred twenty-three million, three hundred thirty-two thousand, four hundred one".