442102121201243 has 4 divisors (see below), whose sum is σ = 442102169314848. Its totient is φ = 442102073087640.

The previous prime is 442102121201239. The next prime is 442102121201287. The reversal of 442102121201243 is 342102121201244.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 442102121201243 - 2² = 442102121201239 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442102121201743) 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, 5504771 + ... + 30240812.

It is an arithmetic number, because the mean of its divisors is an integer number (110525542328712).

Almost surely, 2^{442102121201243} is an apocalyptic number.

442102121201243 is a deficient number, since it is larger than the sum of its proper divisors (48113605).

442102121201243 is a wasteful number, since it uses less digits than its factorization.

442102121201243 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48113604.

The product of its (nonzero) digits is 6144, while the sum is 29.

Adding to 442102121201243 its reverse (342102121201244), we get a palindrome (784204242402487).

Subtracting from 442102121201243 its reverse (342102121201244), we obtain a palindrome (99999999999999).

The spelling of 442102121201243 in words is "four hundred forty-two trillion, one hundred two billion, one hundred twenty-one million, two hundred one thousand, two hundred forty-three".