1121111312 has 20 divisors (see below), whose sum is σ = 2193662796. Its totient is φ = 555004800.

The previous prime is 1121111293. The next prime is 1121111317. The reversal of 1121111312 is 2131111211.

It can be written as a sum of positive squares in 2 ways, for example, as 527896576 + 593214736 = 22976^2 + 24356^2 .

It is a super-2 number, since 2×1121111312² = 2513781147788722688, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1121111317) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 345263 + ... + 348494.

Almost surely, 2^1121111312 is an apocalyptic number.

It is an amenable number.

1121111312 is a deficient number, since it is larger than the sum of its proper divisors (1072551484).

1121111312 is a wasteful number, since it uses less digits than its factorization.

1121111312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693866 (or 693860 counting only the distinct ones).

The product of its digits is 12, while the sum is 14.

The square root of 1121111312 is about 33483.0003434579. Note that the first 3 decimals coincide. The cubic root of 1121111312 is about 1038.8421878395.

Adding to 1121111312 its reverse (2131111211), we get a palindrome (3252222523).

The spelling of 1121111312 in words is "one billion, one hundred twenty-one million, one hundred eleven thousand, three hundred twelve".