1212013312 has 18 divisors (see below), whose sum is σ = 2419292708. Its totient is φ = 606006528.

The previous prime is 1212013279. The next prime is 1212013399. The reversal of 1212013312 is 2133102121.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2366958 + ... + 2367469.

Almost surely, 2^1212013312 is an apocalyptic number.

It is an amenable number.

1212013312 is a deficient number, since it is larger than the sum of its proper divisors (1207279396).

1212013312 is an frugal number, since it uses more digits than its factorization.

1212013312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4734443 (or 4734429 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 1212013312 is about 34813.9815591380. The cubic root of 1212013312 is about 1066.1929257387.

Adding to 1212013312 its reverse (2133102121), we get a palindrome (3345115433).

The spelling of 1212013312 in words is "one billion, two hundred twelve million, thirteen thousand, three hundred twelve".