4042423201221 has 16 divisors (see below), whose sum is σ = 6021862275520. Its totient is φ = 2680059577680.

The previous prime is 4042423201217. The next prime is 4042423201277. The reversal of 4042423201221 is 1221023242404.

It is a happy number.

4042423201221 is a `hidden beast` number, since 4 + 0 + 424 + 232 + 0 + 1 + 2 + 2 + 1 = 666.

It is not a de Polignac number, because 4042423201221 - 2² = 4042423201217 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4042423201721) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 413584555 + ... + 413594328.

It is an arithmetic number, because the mean of its divisors is an integer number (376366392220).

Almost surely, 2^{4042423201221} is an apocalyptic number.

It is an amenable number.

4042423201221 is a deficient number, since it is larger than the sum of its proper divisors (1979439074299).

4042423201221 is a wasteful number, since it uses less digits than its factorization.

4042423201221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 827179073 (or 827179067 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 4042423201221 its reverse (1221023242404), we get a palindrome (5263446443625).

The spelling of 4042423201221 in words is "four trillion, forty-two billion, four hundred twenty-three million, two hundred one thousand, two hundred twenty-one".