212110111242 has 16 divisors (see below), whose sum is σ = 471355802880. Its totient is φ = 70703370396.

The previous prime is 212110111237. The next prime is 212110111249. The reversal of 212110111242 is 242111011212.

212110111242 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212110111242² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (212110111249) by changing a digit.

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 in 7 ways as a sum of consecutive naturals, for example, 1963982458 + ... + 1963982565.

It is an arithmetic number, because the mean of its divisors is an integer number (29459737680).

Almost surely, 2^212110111242 is an apocalyptic number.

212110111242 is an abundant number, since it is smaller than the sum of its proper divisors (259245691638).

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

212110111242 is a wasteful number, since it uses less digits than its factorization.

212110111242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3927965034 (or 3927965028 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 212110111242 its reverse (242111011212), we get a palindrome (454221122454).

The spelling of 212110111242 in words is "two hundred twelve billion, one hundred ten million, one hundred eleven thousand, two hundred forty-two".