111212110121142 has 8 divisors (see below), whose sum is σ = 222424220242296. Its totient is φ = 37070703373712.

The previous prime is 111212110121113. The next prime is 111212110121143. The reversal of 111212110121142 is 241121011212111.

It is a sphenic number, since it is the product of 3 distinct primes.

111212110121142 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111212110121143) 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, 9267675843423 + ... + 9267675843434.

It is an arithmetic number, because the mean of its divisors is an integer number (27803027530287).

Almost surely, 2^{111212110121142} is an apocalyptic number.

111212110121142 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

111212110121142 is a wasteful number, since it uses less digits than its factorization.

111212110121142 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18535351686862.

The product of its (nonzero) digits is 64, while the sum is 21.

Adding to 111212110121142 its reverse (241121011212111), we get a palindrome (352333121333253).

The spelling of 111212110121142 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred ten million, one hundred twenty-one thousand, one hundred forty-two".