4312404122921 has 2 divisors, whose sum is σ = 4312404122922. Its totient is φ = 4312404122920.

The previous prime is 4312404122863. The next prime is 4312404122933. The reversal of 4312404122921 is 1292214042134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 4045388029225 + 267016093696 = 2011315^2 + 516736^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4312404122921 is a prime.

It is not a weakly prime, because it can be changed into another prime (4312404122981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2156202061460 + 2156202061461.

It is an arithmetic number, because the mean of its divisors is an integer number (2156202061461).

Almost surely, 2^{4312404122921} is an apocalyptic number.

It is an amenable number.

4312404122921 is a deficient number, since it is larger than the sum of its proper divisors (1).

4312404122921 is an equidigital number, since it uses as much as digits as its factorization.

4312404122921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 4312404122921 in words is "four trillion, three hundred twelve billion, four hundred four million, one hundred twenty-two thousand, nine hundred twenty-one".