111020202121018 has 8 divisors (see below), whose sum is σ = 166532124394548. Its totient is φ = 55509493989504.

The previous prime is 111020202121013. The next prime is 111020202121057. The reversal of 111020202121018 is 810121202020111.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 97935031741369 + 13085170379649 = 9896213^2 + 3617343^2 .

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

It is a self number, because there is not a number n which added to its sum of digits gives 111020202121018.

It is not an unprimeable number, because it can be changed into a prime (111020202121013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 303306871 + ... + 303672682.

Almost surely, 2^{111020202121018} is an apocalyptic number.

111020202121018 is a deficient number, since it is larger than the sum of its proper divisors (55511922273530).

111020202121018 is an equidigital number, since it uses as much as digits as its factorization.

111020202121018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 607071008.

The product of its (nonzero) digits is 128, while the sum is 22.

Adding to 111020202121018 its reverse (810121202020111), we get a palindrome (921141404141129).

The spelling of 111020202121018 in words is "one hundred eleven trillion, twenty billion, two hundred two million, one hundred twenty-one thousand, eighteen".