13201021111 has 4 divisors (see below), whose sum is σ = 13208410152. Its totient is φ = 13193632072.

The previous prime is 13201021087. The next prime is 13201021117. The reversal of 13201021111 is 11112010231.

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 13201021111 - 2¹³ = 13201012919 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13201021091 and 13201021100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13201021117) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3691840 + ... + 3695413.

It is an arithmetic number, because the mean of its divisors is an integer number (3302102538).

Almost surely, 2^13201021111 is an apocalyptic number.

13201021111 is a deficient number, since it is larger than the sum of its proper divisors (7389041).

13201021111 is an equidigital number, since it uses as much as digits as its factorization.

13201021111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7389040.

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

Adding to 13201021111 its reverse (11112010231), we get a palindrome (24313031342).

The spelling of 13201021111 in words is "thirteen billion, two hundred one million, twenty-one thousand, one hundred eleven".