21320102401 has 8 divisors (see below), whose sum is σ = 23086964264. Its totient is φ = 19571362560.

The previous prime is 21320102383. The next prime is 21320102413. The reversal of 21320102401 is 10420102312.

It can be written as a sum of positive squares in 4 ways, for example, as 2033559025 + 19286543376 = 45095^2 + 138876^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21320102401 - 2¹⁷ = 21319971329 is a prime.

It is not an unprimeable number, because it can be changed into a prime (21320102501) 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 7 ways as a sum of consecutive naturals, for example, 4528056 + ... + 4532761.

It is an arithmetic number, because the mean of its divisors is an integer number (2885870533).

Almost surely, 2^21320102401 is an apocalyptic number.

It is an amenable number.

21320102401 is a deficient number, since it is larger than the sum of its proper divisors (1766861863).

21320102401 is a wasteful number, since it uses less digits than its factorization.

21320102401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9061011.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 21320102401 its reverse (10420102312), we get a palindrome (31740204713).

The spelling of 21320102401 in words is "twenty-one billion, three hundred twenty million, one hundred two thousand, four hundred one".