13203111221111 has 16 divisors (see below), whose sum is σ = 15157342805760. Its totient is φ = 11265952266240.

The previous prime is 13203111221107. The next prime is 13203111221129. The reversal of 13203111221111 is 11112211130231.

It is not a de Polignac number, because 13203111221111 - 2² = 13203111221107 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 (13203111221141) 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 15 ways as a sum of consecutive naturals, for example, 646016 + ... + 5179146.

It is an arithmetic number, because the mean of its divisors is an integer number (947333925360).

Almost surely, 2^{13203111221111} is an apocalyptic number.

13203111221111 is a deficient number, since it is larger than the sum of its proper divisors (1954231584649).

13203111221111 is a wasteful number, since it uses less digits than its factorization.

13203111221111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4535014.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 13203111221111 its reverse (11112211130231), we get a palindrome (24315322351342).

The spelling of 13203111221111 in words is "thirteen trillion, two hundred three billion, one hundred eleven million, two hundred twenty-one thousand, one hundred eleven".