21334052401 has 2 divisors, whose sum is σ = 21334052402. Its totient is φ = 21334052400.

The previous prime is 21334052371. The next prime is 21334052413. The reversal of 21334052401 is 10425043312.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15293032225 + 6041020176 = 123665^2 + 77724^2 .

It is a cyclic number.

It is not a de Polignac number, because 21334052401 - 2¹⁹ = 21333528113 is a prime.

It is a super-2 number, since 2×21334052401² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (21334052461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10667026200 + 10667026201.

It is an arithmetic number, because the mean of its divisors is an integer number (10667026201).

Almost surely, 2^21334052401 is an apocalyptic number.

It is an amenable number.

21334052401 is a deficient number, since it is larger than the sum of its proper divisors (1).

21334052401 is an equidigital number, since it uses as much as digits as its factorization.

21334052401 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 25.

Adding to 21334052401 its reverse (10425043312), we get a palindrome (31759095713).

The spelling of 21334052401 in words is "twenty-one billion, three hundred thirty-four million, fifty-two thousand, four hundred one".