42442140123121 has 4 divisors (see below), whose sum is σ = 42442154718832. Its totient is φ = 42442125527412.

The previous prime is 42442140123107. The next prime is 42442140123211. The reversal of 42442140123121 is 12132104124424.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 42442140123121 - 2²⁵ = 42442106568689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42442140123821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1284351 + ... + 9302356.

It is an arithmetic number, because the mean of its divisors is an integer number (10610538679708).

Almost surely, 2^{42442140123121} is an apocalyptic number.

It is an amenable number.

42442140123121 is a deficient number, since it is larger than the sum of its proper divisors (14595711).

42442140123121 is a wasteful number, since it uses less digits than its factorization.

42442140123121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14595710.

The product of its (nonzero) digits is 12288, while the sum is 31.

Adding to 42442140123121 its reverse (12132104124424), we get a palindrome (54574244247545).

The spelling of 42442140123121 in words is "forty-two trillion, four hundred forty-two billion, one hundred forty million, one hundred twenty-three thousand, one hundred twenty-one".