142421044021055 has 4 divisors (see below), whose sum is σ = 170905252825272. Its totient is φ = 113936835216840.

The previous prime is 142421044021051. The next prime is 142421044021129. The reversal of 142421044021055 is 550120440124241.

It is a happy number.

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

It is not a de Polignac number, because 142421044021055 - 2² = 142421044021051 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 (142421044021051) 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, 14242104402101 + ... + 14242104402110.

It is an arithmetic number, because the mean of its divisors is an integer number (42726313206318).

Almost surely, 2^{142421044021055} is an apocalyptic number.

142421044021055 is a deficient number, since it is larger than the sum of its proper divisors (28484208804217).

142421044021055 is an equidigital number, since it uses as much as digits as its factorization.

142421044021055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28484208804216.

The product of its (nonzero) digits is 51200, while the sum is 35.

Adding to 142421044021055 its reverse (550120440124241), we get a palindrome (692541484145296).

The spelling of 142421044021055 in words is "one hundred forty-two trillion, four hundred twenty-one billion, forty-four million, twenty-one thousand, fifty-five".