121233111102 has 128 divisors (see below), whose sum is σ = 286433280000. Its totient is φ = 37901164896.

The previous prime is 121233111071. The next prime is 121233111107. The reversal of 121233111102 is 201111332121.

121233111102 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

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 (121233111107) 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 63 ways as a sum of consecutive naturals, for example, 96292549 + ... + 96293807.

It is an arithmetic number, because the mean of its divisors is an integer number (2237760000).

Almost surely, 2^121233111102 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121233111102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (143216640000).

121233111102 is an abundant number, since it is smaller than the sum of its proper divisors (165200168898).

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

121233111102 is a wasteful number, since it uses less digits than its factorization.

121233111102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2155 (or 2149 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 18.

Adding to 121233111102 its reverse (201111332121), we get a palindrome (322344443223).

The spelling of 121233111102 in words is "one hundred twenty-one billion, two hundred thirty-three million, one hundred eleven thousand, one hundred two".