13012211111 has 4 divisors (see below), whose sum is σ = 13777635312. Its totient is φ = 12246786912.

The previous prime is 13012211087. The next prime is 13012211129. The reversal of 13012211111 is 11111221031.

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 13012211111 - 2¹⁰ = 13012210087 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13012211131) 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, 382712075 + ... + 382712108.

It is an arithmetic number, because the mean of its divisors is an integer number (3444408828).

Almost surely, 2^13012211111 is an apocalyptic number.

13012211111 is a deficient number, since it is larger than the sum of its proper divisors (765424201).

13012211111 is an equidigital number, since it uses as much as digits as its factorization.

13012211111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 765424200.

The product of its (nonzero) digits is 12, while the sum is 14.

Adding to 13012211111 its reverse (11111221031), we get a palindrome (24123432142).

The spelling of 13012211111 in words is "thirteen billion, twelve million, two hundred eleven thousand, one hundred eleven".