3112001221 has 12 divisors (see below), whose sum is σ = 3622008000. Its totient is φ = 2666011320.

The previous prime is 3112001183. The next prime is 3112001257. The reversal of 3112001221 is 1221002113.

It is not a de Polignac number, because 3112001221 - 2¹⁹ = 3111476933 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3112061221) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82066 + ... + 113836.

It is an arithmetic number, because the mean of its divisors is an integer number (301834000).

Almost surely, 2^3112001221 is an apocalyptic number.

It is an amenable number.

3112001221 is a deficient number, since it is larger than the sum of its proper divisors (510006779).

3112001221 is a wasteful number, since it uses less digits than its factorization.

3112001221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33784 (or 33777 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 13.

The square root of 3112001221 is about 55785.3136676670. The cubic root of 3112001221 is about 1459.9789233525.

Adding to 3112001221 its reverse (1221002113), we get a palindrome (4333003334).

The spelling of 3112001221 in words is "three billion, one hundred twelve million, one thousand, two hundred twenty-one".