21003322100203 has 4 divisors (see below), whose sum is σ = 21003779028168. Its totient is φ = 21002865172240.

The previous prime is 21003322100147. The next prime is 21003322100209. The reversal of 21003322100203 is 30200122330012.

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

It is a cyclic number.

It is not a de Polignac number, because 21003322100203 - 2⁹ = 21003322099691 is a prime.

It is a super-2 number, since 2×21003322100203² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21003322100209) 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, 228395026 + ... + 228486967.

It is an arithmetic number, because the mean of its divisors is an integer number (5250944757042).

Almost surely, 2^{21003322100203} is an apocalyptic number.

21003322100203 is a deficient number, since it is larger than the sum of its proper divisors (456927965).

21003322100203 is an equidigital number, since it uses as much as digits as its factorization.

21003322100203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456927964.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21003322100203 its reverse (30200122330012), we get a palindrome (51203444430215).

The spelling of 21003322100203 in words is "twenty-one trillion, three billion, three hundred twenty-two million, one hundred thousand, two hundred three".