1111312345 has 16 divisors (see below), whose sum is σ = 1566718272. Its totient is φ = 746055360.

The previous prime is 1111312343. The next prime is 1111312351. The reversal of 1111312345 is 5432131111.

It is a happy number.

It is not a de Polignac number, because 1111312345 - 2¹ = 1111312343 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1111312343) 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, 776427 + ... + 777856.

It is an arithmetic number, because the mean of its divisors is an integer number (97919892).

Almost surely, 2^1111312345 is an apocalyptic number.

It is an amenable number.

1111312345 is a deficient number, since it is larger than the sum of its proper divisors (455405927).

1111312345 is a wasteful number, since it uses less digits than its factorization.

1111312345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1554312.

The product of its digits is 360, while the sum is 22.

The square root of 1111312345 is about 33336.3517050082. The cubic root of 1111312345 is about 1035.8066929249.

Adding to 1111312345 its reverse (5432131111), we get a palindrome (6543443456).

The spelling of 1111312345 in words is "one billion, one hundred eleven million, three hundred twelve thousand, three hundred forty-five".