21103201002113 has 6 divisors (see below), whose sum is σ = 21805909048962. Its totient is φ = 20422452581760.

The previous prime is 21103201002109. The next prime is 21103201002133. The reversal of 21103201002113 is 31120010230112.

It can be written as a sum of positive squares in only one way, i.e., 10964886500929 + 10138314501184 = 3311327^2 + 3184072^2 .

It is not a de Polignac number, because 21103201002113 - 2² = 21103201002109 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21103201002091 and 21103201002100.

It is not an unprimeable number, because it can be changed into a prime (21103201002133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10979812256 + ... + 10979814177.

It is an arithmetic number, because the mean of its divisors is an integer number (3634318174827).

Almost surely, 2^{21103201002113} is an apocalyptic number.

It is an amenable number.

21103201002113 is a deficient number, since it is larger than the sum of its proper divisors (702708046849).

21103201002113 is an equidigital number, since it uses as much as digits as its factorization.

21103201002113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21959626495 (or 21959626464 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 21103201002113 its reverse (31120010230112), we get a palindrome (52223211232225).

The spelling of 21103201002113 in words is "twenty-one trillion, one hundred three billion, two hundred one million, two thousand, one hundred thirteen".