21321130103201 has 4 divisors (see below), whose sum is σ = 22056341486100. Its totient is φ = 20585918720304.

The previous prime is 21321130103167. The next prime is 21321130103209. The reversal of 21321130103201 is 10230103112312.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5967389094976 + 15353741008225 = 2442824^2 + 3918385^2 .

It is a cyclic number.

It is not a de Polignac number, because 21321130103201 - 2³⁰ = 21320056361377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21321130103209) 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, 367605691406 + ... + 367605691463.

It is an arithmetic number, because the mean of its divisors is an integer number (5514085371525).

Almost surely, 2^{21321130103201} is an apocalyptic number.

It is an amenable number.

21321130103201 is a deficient number, since it is larger than the sum of its proper divisors (735211382899).

21321130103201 is an equidigital number, since it uses as much as digits as its factorization.

21321130103201 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 735211382898.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 21321130103201 its reverse (10230103112312), we get a palindrome (31551233215513).

The spelling of 21321130103201 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred thirty million, one hundred three thousand, two hundred one".