121111112202102 has 96 divisors (see below), whose sum is σ = 296041193290080. Its totient is φ = 36673759108800.

The previous prime is 121111112202061. The next prime is 121111112202127. The reversal of 121111112202102 is 201202211111121.

It is a happy number.

121111112202102 is a `hidden beast` number, since 1 + 211 + 11 + 11 + 220 + 210 + 2 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2312548 + ... + 15734360.

It is an arithmetic number, because the mean of its divisors is an integer number (3083762430105).

Almost surely, 2^{121111112202102} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121111112202102, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148020596645040).

121111112202102 is an abundant number, since it is smaller than the sum of its proper divisors (174930081087978).

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

121111112202102 is a wasteful number, since it uses less digits than its factorization.

121111112202102 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13423227 (or 13423210 counting only the distinct ones).

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

Adding to 121111112202102 its reverse (201202211111121), we get a palindrome (322313323313223).

The spelling of 121111112202102 in words is "one hundred twenty-one trillion, one hundred eleven billion, one hundred twelve million, two hundred two thousand, one hundred two".