21304102401 has 6 divisors (see below), whose sum is σ = 30772592370. Its totient is φ = 14202734928.

The previous prime is 21304102399. The next prime is 21304102403. The reversal of 21304102401 is 10420140312.

21304102401 is a `hidden beast` number, since 2 + 13 + 0 + 410 + 240 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (21304102399) and next prime (21304102403).

It can be written as a sum of positive squares in only one way, i.e., 13543373376 + 7760729025 = 116376^2 + 88095^2 .

It is not a de Polignac number, because 21304102401 - 2¹ = 21304102399 is a prime.

It is a super-2 number, since 2×21304102401² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21304102403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1183561236 + ... + 1183561253.

It is an arithmetic number, because the mean of its divisors is an integer number (5128765395).

Almost surely, 2^21304102401 is an apocalyptic number.

It is an amenable number.

21304102401 is a deficient number, since it is larger than the sum of its proper divisors (9468489969).

21304102401 is a wasteful number, since it uses less digits than its factorization.

21304102401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2367122495 (or 2367122492 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 21304102401 its reverse (10420140312), we get a palindrome (31724242713).

The spelling of 21304102401 in words is "twenty-one billion, three hundred four million, one hundred two thousand, four hundred one".