4312040121421 has 2 divisors, whose sum is σ = 4312040121422. Its totient is φ = 4312040121420.

The previous prime is 4312040121331. The next prime is 4312040121457. The reversal of 4312040121421 is 1241210402134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2878488885321 + 1433551236100 = 1696611^2 + 1197310^2 .

It is a cyclic number.

It is not a de Polignac number, because 4312040121421 - 2²¹ = 4312038024269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4312040121721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2156020060710 + 2156020060711.

It is an arithmetic number, because the mean of its divisors is an integer number (2156020060711).

Almost surely, 2^{4312040121421} is an apocalyptic number.

It is an amenable number.

4312040121421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4312040121421 is an equidigital number, since it uses as much as digits as its factorization.

4312040121421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1536, while the sum is 25.

Adding to 4312040121421 its reverse (1241210402134), we get a palindrome (5553250523555).

The spelling of 4312040121421 in words is "four trillion, three hundred twelve billion, forty million, one hundred twenty-one thousand, four hundred twenty-one".