21010422115 has 4 divisors (see below), whose sum is σ = 25212506544. Its totient is φ = 16808337688.

The previous prime is 21010422109. The next prime is 21010422131. The reversal of 21010422115 is 51122401012.

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 21010422115 - 2²⁵ = 20976867683 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21010422092 and 21010422101.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2101042207 + ... + 2101042216.

It is an arithmetic number, because the mean of its divisors is an integer number (6303126636).

Almost surely, 2^21010422115 is an apocalyptic number.

21010422115 is a deficient number, since it is larger than the sum of its proper divisors (4202084429).

21010422115 is an equidigital number, since it uses as much as digits as its factorization.

21010422115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4202084428.

The product of its (nonzero) digits is 160, while the sum is 19.

Adding to 21010422115 its reverse (51122401012), we get a palindrome (72132823127).

The spelling of 21010422115 in words is "twenty-one billion, ten million, four hundred twenty-two thousand, one hundred fifteen".