21423422412401 has 8 divisors (see below), whose sum is σ = 21450782853864. Its totient is φ = 21396071726080.

The previous prime is 21423422412389. The next prime is 21423422412407. The reversal of 21423422412401 is 10421422432412.

It can be written as a sum of positive squares in 4 ways, for example, as 16319369996176 + 5104052416225 = 4039724^2 + 2259215^2 .

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-21423422412401 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 (21423422412407) 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, 1961315 + ... + 6833271.

It is an arithmetic number, because the mean of its divisors is an integer number (2681347856733).

Almost surely, 2^{21423422412401} is an apocalyptic number.

It is an amenable number.

21423422412401 is a deficient number, since it is larger than the sum of its proper divisors (27360441463).

21423422412401 is an equidigital number, since it uses as much as digits as its factorization.

21423422412401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877571.

The product of its (nonzero) digits is 24576, while the sum is 32.

Adding to 21423422412401 its reverse (10421422432412), we get a palindrome (31844844844813).

The spelling of 21423422412401 in words is "twenty-one trillion, four hundred twenty-three billion, four hundred twenty-two million, four hundred twelve thousand, four hundred one".