21203233001113 has 4 divisors (see below), whose sum is σ = 21603294001188. Its totient is φ = 20803172001040.

The previous prime is 21203233001089. The next prime is 21203233001189. The reversal of 21203233001113 is 31110033230212.

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 13567339791769 + 7635893209344 = 3683387^2 + 2763312^2 .

It is a cyclic number.

It is not a de Polignac number, because 21203233001113 - 2³³ = 21194643066521 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21203233601113) 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, 200030499958 + ... + 200030500063.

It is an arithmetic number, because the mean of its divisors is an integer number (5400823500297).

Almost surely, 2^{21203233001113} is an apocalyptic number.

It is an amenable number.

21203233001113 is a deficient number, since it is larger than the sum of its proper divisors (400061000075).

21203233001113 is an equidigital number, since it uses as much as digits as its factorization.

21203233001113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400061000074.

The product of its (nonzero) digits is 648, while the sum is 22.

Adding to 21203233001113 its reverse (31110033230212), we get a palindrome (52313266231325).

The spelling of 21203233001113 in words is "twenty-one trillion, two hundred three billion, two hundred thirty-three million, one thousand, one hundred thirteen".