3212221312 has 32 divisors (see below), whose sum is σ = 6404396400. Its totient is φ = 1604843520.

The previous prime is 3212221273. The next prime is 3212221321. The reversal of 3212221312 is 2131222123.

It is a tau number, because it is divible by the number of its divisors (32).

It is a self number, because there is not a number n which added to its sum of digits gives 3212221312.

It is a congruent number.

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, 164989 + ... + 183427.

Almost surely, 2^3212221312 is an apocalyptic number.

3212221312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3212221312 is a deficient number, since it is larger than the sum of its proper divisors (3192175088).

3212221312 is a wasteful number, since it uses less digits than its factorization.

3212221312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19814 (or 19802 counting only the distinct ones).

The product of its digits is 288, while the sum is 19.

The square root of 3212221312 is about 56676.4617103079. The cubic root of 3212221312 is about 1475.4862037103.

Adding to 3212221312 its reverse (2131222123), we get a palindrome (5343443435).

The spelling of 3212221312 in words is "three billion, two hundred twelve million, two hundred twenty-one thousand, three hundred twelve".