4312361221 has 4 divisors (see below), whose sum is σ = 4928412832. Its totient is φ = 3696309612.

The previous prime is 4312361213. The next prime is 4312361227. The reversal of 4312361221 is 1221632134.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4312361221 - 2³ = 4312361213 is a prime.

It is a super-2 number, since 2×4312361221² = 37192918600769221682, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4312361227) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 308025795 + ... + 308025808.

It is an arithmetic number, because the mean of its divisors is an integer number (1232103208).

Almost surely, 2^4312361221 is an apocalyptic number.

It is an amenable number.

4312361221 is a deficient number, since it is larger than the sum of its proper divisors (616051611).

4312361221 is an equidigital number, since it uses as much as digits as its factorization.

4312361221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 616051610.

The product of its digits is 1728, while the sum is 25.

The square root of 4312361221 is about 65668.5710290699. The cubic root of 4312361221 is about 1627.6900574723.

Adding to 4312361221 its reverse (1221632134), we get a palindrome (5533993355).

The spelling of 4312361221 in words is "four billion, three hundred twelve million, three hundred sixty-one thousand, two hundred twenty-one".