2012221312 has 16 divisors (see below), whose sum is σ = 4008722400. Its totient is φ = 1006110592.

The previous prime is 2012221307. The next prime is 2012221327. The reversal of 2012221312 is 2131222102.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (16).

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7860112 + ... + 7860367.

It is an arithmetic number, because the mean of its divisors is an integer number (250545150).

Almost surely, 2^2012221312 is an apocalyptic number.

It is an amenable number.

2012221312 is a deficient number, since it is larger than the sum of its proper divisors (1996501088).

2012221312 is an equidigital number, since it uses as much as digits as its factorization.

2012221312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15720493 (or 15720481 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

The square root of 2012221312 is about 44857.7898697651. The cubic root of 2012221312 is about 1262.4821549875.

Adding to 2012221312 its reverse (2131222102), we get a palindrome (4143443414).

The spelling of 2012221312 in words is "two billion, twelve million, two hundred twenty-one thousand, three hundred twelve".