55123141241242 has 4 divisors (see below), whose sum is σ = 82684711861866. Its totient is φ = 27561570620620.

The previous prime is 55123141241239. The next prime is 55123141241279. The reversal of 55123141241242 is 24214214132155.

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

It can be written as a sum of positive squares in only one way, i.e., 33258623486841 + 21864517754401 = 5767029^2 + 4675951^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13780785310309 + ... + 13780785310312.

Almost surely, 2^{55123141241242} is an apocalyptic number.

55123141241242 is a deficient number, since it is larger than the sum of its proper divisors (27561570620624).

55123141241242 is a wasteful number, since it uses less digits than its factorization.

55123141241242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27561570620623.

The product of its digits is 76800, while the sum is 37.

Adding to 55123141241242 its reverse (24214214132155), we get a palindrome (79337355373397).

The spelling of 55123141241242 in words is "fifty-five trillion, one hundred twenty-three billion, one hundred forty-one million, two hundred forty-one thousand, two hundred forty-two".