21403301441 has 2 divisors, whose sum is σ = 21403301442. Its totient is φ = 21403301440.

The previous prime is 21403301407. The next prime is 21403301467. The reversal of 21403301441 is 14410330412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21160066225 + 243235216 = 145465^2 + 15596^2 .

It is a cyclic number.

It is not a de Polignac number, because 21403301441 - 2¹⁸ = 21403039297 is a prime.

It is a super-3 number, since 3×21403301441³ (a number of 32 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (21403301341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10701650720 + 10701650721.

It is an arithmetic number, because the mean of its divisors is an integer number (10701650721).

Almost surely, 2^21403301441 is an apocalyptic number.

It is an amenable number.

21403301441 is a deficient number, since it is larger than the sum of its proper divisors (1).

21403301441 is an equidigital number, since it uses as much as digits as its factorization.

21403301441 is an evil number, because the sum of its binary digits is even.

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

Adding to 21403301441 its reverse (14410330412), we get a palindrome (35813631853).

The spelling of 21403301441 in words is "twenty-one billion, four hundred three million, three hundred one thousand, four hundred forty-one".