111233213121 has 8 divisors (see below), whose sum is σ = 148321214080. Its totient is φ = 74150343792.

The previous prime is 111233213093. The next prime is 111233213149. The reversal of 111233213121 is 121312332111.

It is an interprime number because it is at equal distance from previous prime (111233213093) and next prime (111233213149).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-111233213121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (111233213171) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1232041 + ... + 1319238.

It is an arithmetic number, because the mean of its divisors is an integer number (18540151760).

Almost surely, 2^111233213121 is an apocalyptic number.

It is an amenable number.

111233213121 is a deficient number, since it is larger than the sum of its proper divisors (37088000959).

111233213121 is a wasteful number, since it uses less digits than its factorization.

111233213121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2565815.

The product of its digits is 216, while the sum is 21.

Adding to 111233213121 its reverse (121312332111), we get a palindrome (232545545232).

The spelling of 111233213121 in words is "one hundred eleven billion, two hundred thirty-three million, two hundred thirteen thousand, one hundred twenty-one".