111212345 has 16 divisors (see below), whose sum is σ = 140106240. Its totient is φ = 84633600.

The previous prime is 111212323. The next prime is 111212347. The reversal of 111212345 is 543212111.

It is not a de Polignac number, because 111212345 - 2¹² = 111208249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (111212347) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3065 + ... + 15225.

It is an arithmetic number, because the mean of its divisors is an integer number (8756640).

Almost surely, 2^111212345 is an apocalyptic number.

It is an amenable number.

111212345 is a deficient number, since it is larger than the sum of its proper divisors (28893895).

111212345 is a wasteful number, since it uses less digits than its factorization.

111212345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12256.

The product of its digits is 240, while the sum is 20.

The square root of 111212345 is about 10545.7263856028. The cubic root of 111212345 is about 480.8958169825.

Adding to 111212345 its reverse (543212111), we get a palindrome (654424456).

The spelling of 111212345 in words is "one hundred eleven million, two hundred twelve thousand, three hundred forty-five".