1331212112 has 20 divisors (see below), whose sum is σ = 2580474720. Its totient is φ = 665283168.

The previous prime is 1331212111. The next prime is 1331212121. The reversal of 1331212112 is 2112121331.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1331212111) 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, 15773 + ... + 53955.

It is an arithmetic number, because the mean of its divisors is an integer number (129023736).

Almost surely, 2^1331212112 is an apocalyptic number.

It is an amenable number.

1331212112 is a deficient number, since it is larger than the sum of its proper divisors (1249262608).

1331212112 is a wasteful number, since it uses less digits than its factorization.

1331212112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40370 (or 40364 counting only the distinct ones).

The product of its digits is 72, while the sum is 17.

The square root of 1331212112 is about 36485.7795860250. The cubic root of 1331212112 is about 1100.0584299541.

Adding to 1331212112 its reverse (2112121331), we get a palindrome (3443333443).

The spelling of 1331212112 in words is "one billion, three hundred thirty-one million, two hundred twelve thousand, one hundred twelve".