4351913702021 has 2 divisors, whose sum is σ = 4351913702022. Its totient is φ = 4351913702020.

The previous prime is 4351913701973. The next prime is 4351913702027. The reversal of 4351913702021 is 1202073191534.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2806006912996 + 1545906789025 = 1675114^2 + 1243345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4351913702021 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4351913702027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2175956851010 + 2175956851011.

It is an arithmetic number, because the mean of its divisors is an integer number (2175956851011).

Almost surely, 2^{4351913702021} is an apocalyptic number.

It is an amenable number.

4351913702021 is a deficient number, since it is larger than the sum of its proper divisors (1).

4351913702021 is an equidigital number, since it uses as much as digits as its factorization.

4351913702021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

Adding to 4351913702021 its reverse (1202073191534), we get a palindrome (5553986893555).

The spelling of 4351913702021 in words is "four trillion, three hundred fifty-one billion, nine hundred thirteen million, seven hundred two thousand, twenty-one".