21334122401 has 4 divisors (see below), whose sum is σ = 21337254192. Its totient is φ = 21330990612.

The previous prime is 21334122389. The next prime is 21334122413. The reversal of 21334122401 is 10422143312.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (21334122389) and next prime (21334122413).

It is a cyclic number.

It is not a de Polignac number, because 21334122401 - 2¹⁸ = 21333860257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21334122421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1555655 + ... + 1569308.

It is an arithmetic number, because the mean of its divisors is an integer number (5334313548).

Almost surely, 2^21334122401 is an apocalyptic number.

It is an amenable number.

21334122401 is a deficient number, since it is larger than the sum of its proper divisors (3131791).

21334122401 is an equidigital number, since it uses as much as digits as its factorization.

21334122401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3131790.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21334122401 its reverse (10422143312), we get a palindrome (31756265713).

The spelling of 21334122401 in words is "twenty-one billion, three hundred thirty-four million, one hundred twenty-two thousand, four hundred one".