4312011221 has 24 divisors (see below), whose sum is σ = 5286718080. Its totient is φ = 3497038272.

The previous prime is 4312011167. The next prime is 4312011229. The reversal of 4312011221 is 1221102134.

It is not a de Polignac number, because 4312011221 - 2²⁶ = 4244902357 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 4312011221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4312011229) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 869876 + ... + 874818.

It is an arithmetic number, because the mean of its divisors is an integer number (220279920).

Almost surely, 2^4312011221 is an apocalyptic number.

It is an amenable number.

4312011221 is a deficient number, since it is larger than the sum of its proper divisors (974706859).

4312011221 is a wasteful number, since it uses less digits than its factorization.

4312011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5913 (or 5906 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

The square root of 4312011221 is about 65665.9060776595. The cubic root of 4312011221 is about 1627.6460207367.

Adding to 4312011221 its reverse (1221102134), we get a palindrome (5533113355).

The spelling of 4312011221 in words is "four billion, three hundred twelve million, eleven thousand, two hundred twenty-one".