1002442423221 has 24 divisors (see below), whose sum is σ = 1451180885336. Its totient is φ = 666815016960.

The previous prime is 1002442423201. The next prime is 1002442423237. The reversal of 1002442423221 is 1223242442001.

It is a happy number.

1002442423221 is a `hidden beast` number, since 1 + 0 + 0 + 2 + 4 + 424 + 232 + 2 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 69952844196 + 932489579025 = 264486^2 + 965655^2 .

It is not a de Polignac number, because 1002442423221 - 2⁷ = 1002442423093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002442423201) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13757541 + ... + 13830213.

Almost surely, 2^{1002442423221} is an apocalyptic number.

It is an amenable number.

1002442423221 is a deficient number, since it is larger than the sum of its proper divisors (448738462115).

1002442423221 is a wasteful number, since it uses less digits than its factorization.

1002442423221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76053 (or 76050 counting only the distinct ones).

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

Adding to 1002442423221 its reverse (1223242442001), we get a palindrome (2225684865222).

The spelling of 1002442423221 in words is "one trillion, two billion, four hundred forty-two million, four hundred twenty-three thousand, two hundred twenty-one".