111121321213 has 32 divisors (see below), whose sum is σ = 132264668160. Its totient is φ = 91341250560.

The previous prime is 111121321133. The next prime is 111121321231. The reversal of 111121321213 is 312123121111.

It is not a de Polignac number, because 111121321213 - 2⁹ = 111121320701 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 (111121321243) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 29813356 + ... + 29817082.

It is an arithmetic number, because the mean of its divisors is an integer number (4133270880).

Almost surely, 2^111121321213 is an apocalyptic number.

It is an amenable number.

111121321213 is a deficient number, since it is larger than the sum of its proper divisors (21143346947).

111121321213 is a wasteful number, since it uses less digits than its factorization.

111121321213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4717.

The product of its digits is 72, while the sum is 19.

Adding to 111121321213 its reverse (312123121111), we get a palindrome (423244442324).

The spelling of 111121321213 in words is "one hundred eleven billion, one hundred twenty-one million, three hundred twenty-one thousand, two hundred thirteen".