4243313134421 has 2 divisors, whose sum is σ = 4243313134422. Its totient is φ = 4243313134420.

The previous prime is 4243313134409. The next prime is 4243313134433. The reversal of 4243313134421 is 1244313133424.

It is a balanced prime because it is at equal distance from previous prime (4243313134409) and next prime (4243313134433).

It can be written as a sum of positive squares in only one way, i.e., 3711733615396 + 531579519025 = 1926586^2 + 729095^2 .

It is a cyclic number.

It is not a de Polignac number, because 4243313134421 - 2³⁰ = 4242239392597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4243313134441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2121656567210 + 2121656567211.

It is an arithmetic number, because the mean of its divisors is an integer number (2121656567211).

Almost surely, 2^{4243313134421} is an apocalyptic number.

It is an amenable number.

4243313134421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4243313134421 is an equidigital number, since it uses as much as digits as its factorization.

4243313134421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 35.

Adding to 4243313134421 its reverse (1244313133424), we get a palindrome (5487626267845).

It can be divided in two parts, 4243313 and 134421, that added together give a palindrome (4377734).

The spelling of 4243313134421 in words is "four trillion, two hundred forty-three billion, three hundred thirteen million, one hundred thirty-four thousand, four hundred twenty-one".