4042251145321 has 2 divisors, whose sum is σ = 4042251145322. Its totient is φ = 4042251145320.

The previous prime is 4042251145319. The next prime is 4042251145357. The reversal of 4042251145321 is 1235411522404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4034714995600 + 7536149721 = 2008660^2 + 86811^2 .

It is a cyclic number.

It is not a de Polignac number, because 4042251145321 - 2¹ = 4042251145319 is a prime.

Together with 4042251145319, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (4042251145021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2021125572660 + 2021125572661.

It is an arithmetic number, because the mean of its divisors is an integer number (2021125572661).

Almost surely, 2^{4042251145321} is an apocalyptic number.

It is an amenable number.

4042251145321 is a deficient number, since it is larger than the sum of its proper divisors (1).

4042251145321 is an equidigital number, since it uses as much as digits as its factorization.

4042251145321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38400, while the sum is 34.

Adding to 4042251145321 its reverse (1235411522404), we get a palindrome (5277662667725).

The spelling of 4042251145321 in words is "four trillion, forty-two billion, two hundred fifty-one million, one hundred forty-five thousand, three hundred twenty-one".