3126221312 has 40 divisors (see below), whose sum is σ = 6269664192. Its totient is φ = 1557273600.

The previous prime is 3126221291. The next prime is 3126221323. The reversal of 3126221312 is 2131226213.

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 in 3 ways as a sum of consecutive naturals, for example, 127487 + ... + 150017.

Almost surely, 2^3126221312 is an apocalyptic number.

3126221312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3126221312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3134832096).

3126221312 is an abundant number, since it is smaller than the sum of its proper divisors (3143442880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

3126221312 is an equidigital number, since it uses as much as digits as its factorization.

3126221312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22820 (or 22804 counting only the distinct ones).

The product of its digits is 864, while the sum is 23.

The square root of 3126221312 is about 55912.6221170140. The cubic root of 3126221312 is about 1462.1993049906.

Adding to 3126221312 its reverse (2131226213), we get a palindrome (5257447525).

The spelling of 3126221312 in words is "three billion, one hundred twenty-six million, two hundred twenty-one thousand, three hundred twelve".