442400140224121 has 2 divisors, whose sum is σ = 442400140224122. Its totient is φ = 442400140224120.

The previous prime is 442400140224079. The next prime is 442400140224157. The reversal of 442400140224121 is 121422041004244.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 307048695068025 + 135351445156096 = 17522805^2 + 11634064^2 .

It is a cyclic number.

It is not a de Polignac number, because 442400140224121 - 2¹⁵ = 442400140191353 is a prime.

It is a super-2 number, since 2×442400140224121² (a number of 30 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (442400140224521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 221200070112060 + 221200070112061.

It is an arithmetic number, because the mean of its divisors is an integer number (221200070112061).

Almost surely, 2^{442400140224121} is an apocalyptic number.

It is an amenable number.

442400140224121 is a deficient number, since it is larger than the sum of its proper divisors (1).

442400140224121 is an equidigital number, since it uses as much as digits as its factorization.

442400140224121 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16384, while the sum is 31.

Adding to 442400140224121 its reverse (121422041004244), we get a palindrome (563822181228365).

The spelling of 442400140224121 in words is "four hundred forty-two trillion, four hundred billion, one hundred forty million, two hundred twenty-four thousand, one hundred twenty-one".