4065312232021 has 2 divisors, whose sum is σ = 4065312232022. Its totient is φ = 4065312232020.

The previous prime is 4065312232001. The next prime is 4065312232049. The reversal of 4065312232021 is 1202322135604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3997340442225 + 67971789796 = 1999335^2 + 260714^2 .

It is a cyclic number.

It is not a de Polignac number, because 4065312232021 - 2¹⁵ = 4065312199253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4065312232001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2032656116010 + 2032656116011.

It is an arithmetic number, because the mean of its divisors is an integer number (2032656116011).

Almost surely, 2^{4065312232021} is an apocalyptic number.

It is an amenable number.

4065312232021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4065312232021 is an equidigital number, since it uses as much as digits as its factorization.

4065312232021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17280, while the sum is 31.

Adding to 4065312232021 its reverse (1202322135604), we get a palindrome (5267634367625).

The spelling of 4065312232021 in words is "four trillion, sixty-five billion, three hundred twelve million, two hundred thirty-two thousand, twenty-one".