13215015111 has 4 divisors (see below), whose sum is σ = 17620020152. Its totient is φ = 8810010072.

The previous prime is 13215015101. The next prime is 13215015137. The reversal of 13215015111 is 11151051231.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 13215015111 - 2⁷ = 13215014983 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 (13215015101) 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, 2202502516 + ... + 2202502521.

It is an arithmetic number, because the mean of its divisors is an integer number (4405005038).

Almost surely, 2^13215015111 is an apocalyptic number.

13215015111 is a deficient number, since it is larger than the sum of its proper divisors (4405005041).

13215015111 is an equidigital number, since it uses as much as digits as its factorization.

13215015111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4405005040.

The product of its (nonzero) digits is 150, while the sum is 21.

Adding to 13215015111 its reverse (11151051231), we get a palindrome (24366066342).

The spelling of 13215015111 in words is "thirteen billion, two hundred fifteen million, fifteen thousand, one hundred eleven".