21013115101 has 8 divisors (see below), whose sum is σ = 22948084800. Its totient is φ = 19082259840.

The previous prime is 21013115093. The next prime is 21013115119. The reversal of 21013115101 is 10151131012.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 21013115101 - 2³ = 21013115093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21013115161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1017921 + ... + 1038358.

It is an arithmetic number, because the mean of its divisors is an integer number (2868510600).

Almost surely, 2^21013115101 is an apocalyptic number.

It is an amenable number.

21013115101 is a deficient number, since it is larger than the sum of its proper divisors (1934969699).

21013115101 is a wasteful number, since it uses less digits than its factorization.

21013115101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2057219.

The product of its (nonzero) digits is 30, while the sum is 16.

Adding to 21013115101 its reverse (10151131012), we get a palindrome (31164246113).

The spelling of 21013115101 in words is "twenty-one billion, thirteen million, one hundred fifteen thousand, one hundred one".