13011213511 has 4 divisors (see below), whose sum is σ = 13328560224. Its totient is φ = 12693866800.

The previous prime is 13011213497. The next prime is 13011213529. The reversal of 13011213511 is 11531211031.

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 13011213511 - 2²¹ = 13009116359 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 (13011213541) 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, 158673295 + ... + 158673376.

It is an arithmetic number, because the mean of its divisors is an integer number (3332140056).

Almost surely, 2^13011213511 is an apocalyptic number.

13011213511 is a deficient number, since it is larger than the sum of its proper divisors (317346713).

13011213511 is an equidigital number, since it uses as much as digits as its factorization.

13011213511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317346712.

The product of its (nonzero) digits is 90, while the sum is 19.

Adding to 13011213511 its reverse (11531211031), we get a palindrome (24542424542).

The spelling of 13011213511 in words is "thirteen billion, eleven million, two hundred thirteen thousand, five hundred eleven".