1311103212 has 24 divisors (see below), whose sum is σ = 3157926912. Its totient is φ = 422936400.

The previous prime is 1311103187. The next prime is 1311103217. The reversal of 1311103212 is 2123011131.

It is a happy number.

1311103212 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 1311103191 and 1311103200.

It is not an unprimeable number, because it can be changed into a prime (1311103217) 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, 1761864 + ... + 1762607.

It is an arithmetic number, because the mean of its divisors is an integer number (131580288).

Almost surely, 2^1311103212 is an apocalyptic number.

1311103212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311103212 is an abundant number, since it is smaller than the sum of its proper divisors (1846823700).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1311103212 is a wasteful number, since it uses less digits than its factorization.

1311103212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3524509 (or 3524507 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 1311103212 is about 36209.1592280185. The cubic root of 1311103212 is about 1094.4912496640.

Adding to 1311103212 its reverse (2123011131), we get a palindrome (3434114343).

The spelling of 1311103212 in words is "one billion, three hundred eleven million, one hundred three thousand, two hundred twelve".