111012121221102 has 64 divisors (see below), whose sum is σ = 255276904377600. Its totient is φ = 35717311415520.

The previous prime is 111012121221091. The next prime is 111012121221103. The reversal of 111012121221102 is 201122121210111.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (111012121221103) 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, 5424448 + ... + 15857139.

It is an arithmetic number, because the mean of its divisors is an integer number (3988701630900).

Almost surely, 2^{111012121221102} is an apocalyptic number.

111012121221102 is an abundant number, since it is smaller than the sum of its proper divisors (144264783156498).

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

111012121221102 is a wasteful number, since it uses less digits than its factorization.

111012121221102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21284958 (or 21284952 counting only the distinct ones).

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

Adding to 111012121221102 its reverse (201122121210111), we get a palindrome (312134242431213).

The spelling of 111012121221102 in words is "one hundred eleven trillion, twelve billion, one hundred twenty-one million, two hundred twenty-one thousand, one hundred two".