1311011012 has 12 divisors (see below), whose sum is σ = 2306282496. Its totient is φ = 652073160.

The previous prime is 1311011003. The next prime is 1311011069. The reversal of 1311011012 is 2101101131.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1311010984 and 1311011002.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 857228 + ... + 858755.

It is an arithmetic number, because the mean of its divisors is an integer number (192190208).

Almost surely, 2^1311011012 is an apocalyptic number.

It is an amenable number.

1311011012 is a deficient number, since it is larger than the sum of its proper divisors (995271484).

1311011012 is a wasteful number, since it uses less digits than its factorization.

1311011012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1716178 (or 1716176 counting only the distinct ones).

The product of its (nonzero) digits is 6, while the sum is 11.

The square root of 1311011012 is about 36207.8860471031. The cubic root of 1311011012 is about 1094.4655932911.

Adding to 1311011012 its reverse (2101101131), we get a palindrome (3412112143).

The spelling of 1311011012 in words is "one billion, three hundred eleven million, eleven thousand, twelve".