21102301315 has 4 divisors (see below), whose sum is σ = 25322761584. Its totient is φ = 16881841048.

The previous prime is 21102301313. The next prime is 21102301321. The reversal of 21102301315 is 51310320112.

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 21102301315 - 2¹ = 21102301313 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21102301292 and 21102301301.

It is not an unprimeable number, because it can be changed into a prime (21102301313) 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, 2110230127 + ... + 2110230136.

It is an arithmetic number, because the mean of its divisors is an integer number (6330690396).

Almost surely, 2^21102301315 is an apocalyptic number.

21102301315 is a deficient number, since it is larger than the sum of its proper divisors (4220460269).

21102301315 is an equidigital number, since it uses as much as digits as its factorization.

21102301315 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4220460268.

The product of its (nonzero) digits is 180, while the sum is 19.

Adding to 21102301315 its reverse (51310320112), we get a palindrome (72412621427).

The spelling of 21102301315 in words is "twenty-one billion, one hundred two million, three hundred one thousand, three hundred fifteen".