111212131423242 has 64 divisors (see below), whose sum is σ = 224811382763520. Its totient is φ = 36675062926656.

The previous prime is 111212131423241. The next prime is 111212131423277. The reversal of 111212131423242 is 242324131212111.

It is not an unprimeable number, because it can be changed into a prime (111212131423241) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 671540773 + ... + 671706359.

It is an arithmetic number, because the mean of its divisors is an integer number (3512677855680).

Almost surely, 2^{111212131423242} is an apocalyptic number.

111212131423242 is an abundant number, since it is smaller than the sum of its proper divisors (113599251340278).

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

111212131423242 is a wasteful number, since it uses less digits than its factorization.

111212131423242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168915.

The product of its digits is 4608, while the sum is 30.

Adding to 111212131423242 its reverse (242324131212111), we get a palindrome (353536262635353).

The spelling of 111212131423242 in words is "one hundred eleven trillion, two hundred twelve billion, one hundred thirty-one million, four hundred twenty-three thousand, two hundred forty-two".