21020201103 has 32 divisors (see below), whose sum is σ = 30902572800. Its totient is φ = 12603168000.

The previous prime is 21020201099. The next prime is 21020201113. The reversal of 21020201103 is 30110202012.

It is not a de Polignac number, because 21020201103 - 2² = 21020201099 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21020201113) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6961128 + ... + 6964146.

It is an arithmetic number, because the mean of its divisors is an integer number (965705400).

Almost surely, 2^21020201103 is an apocalyptic number.

21020201103 is a deficient number, since it is larger than the sum of its proper divisors (9882371697).

21020201103 is a wasteful number, since it uses less digits than its factorization.

21020201103 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5223.

The product of its (nonzero) digits is 24, while the sum is 12.

Adding to 21020201103 its reverse (30110202012), we get a palindrome (51130403115).

Subtracting 21020201103 from its reverse (30110202012), we obtain a palindrome (9090000909).

The spelling of 21020201103 in words is "twenty-one billion, twenty million, two hundred one thousand, one hundred three".