4042220301421 has 2 divisors, whose sum is σ = 4042220301422. Its totient is φ = 4042220301420.

The previous prime is 4042220301409. The next prime is 4042220301439. The reversal of 4042220301421 is 1241030222404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2287626000100 + 1754594301321 = 1512490^2 + 1324611^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-4042220301421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (4042220301121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2021110150710 + 2021110150711.

It is an arithmetic number, because the mean of its divisors is an integer number (2021110150711).

Almost surely, 2^{4042220301421} is an apocalyptic number.

It is an amenable number.

4042220301421 is a deficient number, since it is larger than the sum of its proper divisors (1).

4042220301421 is an equidigital number, since it uses as much as digits as its factorization.

4042220301421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 4042220301421 its reverse (1241030222404), we get a palindrome (5283250523825).

The spelling of 4042220301421 in words is "four trillion, forty-two billion, two hundred twenty million, three hundred one thousand, four hundred twenty-one".