21204222344001 has 24 divisors (see below), whose sum is σ = 30798501387264. Its totient is φ = 14057650736640.

The previous prime is 21204222343991. The next prime is 21204222344027. The reversal of 21204222344001 is 10044322240212.

It is a happy number.

21204222344001 is a `hidden beast` number, since 2 + 1 + 2 + 0 + 4 + 22 + 234 + 400 + 1 = 666.

It is not a de Polignac number, because 21204222344001 - 2⁹ = 21204222343489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21204222344401) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3426420 + ... + 7358586.

It is an arithmetic number, because the mean of its divisors is an integer number (1283270891136).

Almost surely, 2^{21204222344001} is an apocalyptic number.

It is an amenable number.

21204222344001 is a deficient number, since it is larger than the sum of its proper divisors (9594279043263).

21204222344001 is a wasteful number, since it uses less digits than its factorization.

21204222344001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935501 (or 3935498 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 21204222344001 its reverse (10044322240212), we get a palindrome (31248544584213).

The spelling of 21204222344001 in words is "twenty-one trillion, two hundred four billion, two hundred twenty-two million, three hundred forty-four thousand, one".