111011212121202 has 48 divisors (see below), whose sum is σ = 240869882373120. Its totient is φ = 36950605322496.

The previous prime is 111011212121123. The next prime is 111011212121209. The reversal of 111011212121202 is 202121212110111.

It is a happy number.

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 (111011212121209) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36024223 + ... + 38984189.

It is an arithmetic number, because the mean of its divisors is an integer number (5018122549440).

Almost surely, 2^{111011212121202} is an apocalyptic number.

111011212121202 is an abundant number, since it is smaller than the sum of its proper divisors (129858670251918).

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

111011212121202 is a wasteful number, since it uses less digits than its factorization.

111011212121202 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2962967 (or 2962964 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 18.

Adding to 111011212121202 its reverse (202121212110111), we get a palindrome (313132424231313).

The spelling of 111011212121202 in words is "one hundred eleven trillion, eleven billion, two hundred twelve million, one hundred twenty-one thousand, two hundred two".