21113203101 has 4 divisors (see below), whose sum is σ = 28150937472. Its totient is φ = 14075468732.

The previous prime is 21113203081. The next prime is 21113203109. The reversal of 21113203101 is 10130231112.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21113203101 - 2¹⁵ = 21113170333 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21113203109) 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, 3518867181 + ... + 3518867186.

It is an arithmetic number, because the mean of its divisors is an integer number (7037734368).

Almost surely, 2^21113203101 is an apocalyptic number.

It is an amenable number.

21113203101 is a deficient number, since it is larger than the sum of its proper divisors (7037734371).

21113203101 is an equidigital number, since it uses as much as digits as its factorization.

21113203101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7037734370.

The product of its (nonzero) digits is 36, while the sum is 15.

Adding to 21113203101 its reverse (10130231112), we get a palindrome (31243434213).

The spelling of 21113203101 in words is "twenty-one billion, one hundred thirteen million, two hundred three thousand, one hundred one".