4311223421 has 4 divisors (see below), whose sum is σ = 4319498844. Its totient is φ = 4302948000.

The previous prime is 4311223417. The next prime is 4311223453. The reversal of 4311223421 is 1243221134.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 484440100 + 3826783321 = 22010^2 + 61861^2 .

It is a cyclic number.

It is not a de Polignac number, because 4311223421 - 2² = 4311223417 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 (4311223321) 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, 4136930 + ... + 4137971.

It is an arithmetic number, because the mean of its divisors is an integer number (1079874711).

Almost surely, 2^4311223421 is an apocalyptic number.

It is an amenable number.

4311223421 is a deficient number, since it is larger than the sum of its proper divisors (8275423).

4311223421 is an equidigital number, since it uses as much as digits as its factorization.

4311223421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8275422.

The product of its digits is 1152, while the sum is 23.

The square root of 4311223421 is about 65659.9072570164. The cubic root of 4311223421 is about 1627.5468916168.

Adding to 4311223421 its reverse (1243221134), we get a palindrome (5554444555).

The spelling of 4311223421 in words is "four billion, three hundred eleven million, two hundred twenty-three thousand, four hundred twenty-one".