3111221021312 has 32 divisors (see below), whose sum is σ = 6198247826100. Its totient is φ = 1555582351360.

The previous prime is 3111221021291. The next prime is 3111221021323. The reversal of 3111221021312 is 2131201221113.

It can be written as a sum of positive squares in 2 ways, for example, as 3110482486336 + 738534976 = 1763656^2 + 27176^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8104364 + ... + 8479572.

Almost surely, 2^{3111221021312} is an apocalyptic number.

3111221021312 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

3111221021312 is a deficient number, since it is larger than the sum of its proper divisors (3087026804788).

3111221021312 is an equidigital number, since it uses as much as digits as its factorization.

3111221021312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440004 (or 439992 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 3111221021312 its reverse (2131201221113), we get a palindrome (5242422242425).

The spelling of 3111221021312 in words is "three trillion, one hundred eleven billion, two hundred twenty-one million, twenty-one thousand, three hundred twelve".