21020103102203 has 4 divisors (see below), whose sum is σ = 21020622375528. Its totient is φ = 21019583828880.

The previous prime is 21020103102181. The next prime is 21020103102263. The reversal of 21020103102203 is 30220130102012.

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 21020103102203 - 2²⁶ = 21020035993339 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21020103102263) 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, 259575938 + ... + 259656903.

It is an arithmetic number, because the mean of its divisors is an integer number (5255155593882).

Almost surely, 2^{21020103102203} is an apocalyptic number.

21020103102203 is a deficient number, since it is larger than the sum of its proper divisors (519273325).

21020103102203 is an equidigital number, since it uses as much as digits as its factorization.

21020103102203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 519273324.

The product of its (nonzero) digits is 144, while the sum is 17.

Adding to 21020103102203 its reverse (30220130102012), we get a palindrome (51240233204215).

The spelling of 21020103102203 in words is "twenty-one trillion, twenty billion, one hundred three million, one hundred two thousand, two hundred three".