121111221111102 has 96 divisors (see below), whose sum is σ = 276230503916640. Its totient is φ = 38299407344640.

The previous prime is 121111221111071. The next prime is 121111221111109. The reversal of 121111221111102 is 201111122111121.

121111221111102 is a `hidden beast` number, since 121 + 111 + 221 + 111 + 102 = 666.

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 (121111221111109) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 46602349 + ... + 49132487.

It is an arithmetic number, because the mean of its divisors is an integer number (2877401082465).

Almost surely, 2^{121111221111102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121111221111102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138115251958320).

121111221111102 is an abundant number, since it is smaller than the sum of its proper divisors (155119282805538).

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

121111221111102 is a wasteful number, since it uses less digits than its factorization.

121111221111102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2531978 (or 2531975 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 18.

Adding to 121111221111102 its reverse (201111122111121), we get a palindrome (322222343222223).

The spelling of 121111221111102 in words is "one hundred twenty-one trillion, one hundred eleven billion, two hundred twenty-one million, one hundred eleven thousand, one hundred two".