12122110412542 has 16 divisors (see below), whose sum is σ = 19581928425360. Its totient is φ = 5594803687872.

The previous prime is 12122110412501. The next prime is 12122110412557. The reversal of 12122110412542 is 24521401122121.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 12122110412542.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15386473 + ... + 16155115.

It is an arithmetic number, because the mean of its divisors is an integer number (1223870526585).

Almost surely, 2^{12122110412542} is an apocalyptic number.

12122110412542 is a deficient number, since it is larger than the sum of its proper divisors (7459818012818).

12122110412542 is a wasteful number, since it uses less digits than its factorization.

12122110412542 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1375227.

The product of its (nonzero) digits is 2560, while the sum is 28.

Adding to 12122110412542 its reverse (24521401122121), we get a palindrome (36643511534663).

The spelling of 12122110412542 in words is "twelve trillion, one hundred twenty-two billion, one hundred ten million, four hundred twelve thousand, five hundred forty-two".