3112011221 has 6 divisors (see below), whose sum is σ = 3420640566. Its totient is φ = 2829101000.

The previous prime is 3112011209. The next prime is 3112011247. The reversal of 3112011221 is 1221102113.

It can be written as a sum of positive squares in only one way, i.e., 1793522500 + 1318488721 = 42350^2 + 36311^2 .

It is not a de Polignac number, because 3112011221 - 2⁶ = 3112011157 is a prime.

It is a super-2 number, since 2×3112011221² = 19369227679259821682, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 3112011196 and 3112011205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3112013221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 12859430 + ... + 12859671.

It is an arithmetic number, because the mean of its divisors is an integer number (570106761).

Almost surely, 2^3112011221 is an apocalyptic number.

It is an amenable number.

3112011221 is a deficient number, since it is larger than the sum of its proper divisors (308629345).

3112011221 is a wasteful number, since it uses less digits than its factorization.

3112011221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25719123 (or 25719112 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 14.

The square root of 3112011221 is about 55785.4032969199. The cubic root of 3112011221 is about 1459.9804871665.

Adding to 3112011221 its reverse (1221102113), we get a palindrome (4333113334).

The spelling of 3112011221 in words is "three billion, one hundred twelve million, eleven thousand, two hundred twenty-one".