442434020402123 has 4 divisors (see below), whose sum is σ = 442438348884360. Its totient is φ = 442429691919888.

The previous prime is 442434020402119. The next prime is 442434020402159. The reversal of 442434020402123 is 321204020434244.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 442434020402123 - 2² = 442434020402119 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (442434020422123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2164087793 + ... + 2164292226.

It is an arithmetic number, because the mean of its divisors is an integer number (110609587221090).

Almost surely, 2^{442434020402123} is an apocalyptic number.

442434020402123 is a deficient number, since it is larger than the sum of its proper divisors (4328482237).

442434020402123 is a wasteful number, since it uses less digits than its factorization.

442434020402123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4328482236.

The product of its (nonzero) digits is 147456, while the sum is 35.

Adding to 442434020402123 its reverse (321204020434244), we get a palindrome (763638040836367).

The spelling of 442434020402123 in words is "four hundred forty-two trillion, four hundred thirty-four billion, twenty million, four hundred two thousand, one hundred twenty-three".