21220104401 has 8 divisors (see below), whose sum is σ = 21829789440. Its totient is φ = 20617010848.

The previous prime is 21220104379. The next prime is 21220104403. The reversal of 21220104401 is 10440102212.

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 21220104401 - 2⁶ = 21220104337 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 21220104401.

It is not an unprimeable number, because it can be changed into a prime (21220104403) 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, 1641341 + ... + 1654218.

It is an arithmetic number, because the mean of its divisors is an integer number (2728723680).

Almost surely, 2^21220104401 is an apocalyptic number.

It is an amenable number.

21220104401 is a deficient number, since it is larger than the sum of its proper divisors (609685039).

21220104401 is a wasteful number, since it uses less digits than its factorization.

21220104401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3295743.

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 21220104401 its reverse (10440102212), we get a palindrome (31660206613).

The spelling of 21220104401 in words is "twenty-one billion, two hundred twenty million, one hundred four thousand, four hundred one".