13120201111 has 4 divisors (see below), whose sum is σ = 13120466832. Its totient is φ = 13119935392.

The previous prime is 13120201103. The next prime is 13120201123. The reversal of 13120201111 is 11110202131.

It is a happy number.

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 13120201111 - 2³ = 13120201103 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13120201091 and 13120201100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13120271111) 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, 34546 + ... + 165631.

It is an arithmetic number, because the mean of its divisors is an integer number (3280116708).

Almost surely, 2^13120201111 is an apocalyptic number.

13120201111 is a deficient number, since it is larger than the sum of its proper divisors (265721).

13120201111 is an equidigital number, since it uses as much as digits as its factorization.

13120201111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265720.

The product of its (nonzero) digits is 12, while the sum is 13.

Adding to 13120201111 its reverse (11110202131), we get a palindrome (24230403242).

It can be divided in two parts, 1312020 and 1111, that added together give a palindrome (1313131).

The spelling of 13120201111 in words is "thirteen billion, one hundred twenty million, two hundred one thousand, one hundred eleven".