121121211110112 has 288 divisors, whose sum is σ = 364979656484352. Its totient is φ = 39494754883584.

The previous prime is 121121211110069. The next prime is 121121211110143. The reversal of 121121211110112 is 211011112121121.

121121211110112 is a `hidden beast` number, since 1 + 211 + 21 + 211 + 110 + 112 = 666.

It is a tau number, because it is divible by the number of its divisors (288).

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, 731957688 + ... + 732123144.

It is an arithmetic number, because the mean of its divisors is an integer number (1267290473904).

Almost surely, 2^{121121211110112} is an apocalyptic number.

121121211110112 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121121211110112, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (182489828242176).

121121211110112 is an abundant number, since it is smaller than the sum of its proper divisors (243858445374240).

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

121121211110112 is a wasteful number, since it uses less digits than its factorization.

121121211110112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167532 (or 167512 counting only the distinct ones).

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

Adding to 121121211110112 its reverse (211011112121121), we get a palindrome (332132323231233).

The spelling of 121121211110112 in words is "one hundred twenty-one trillion, one hundred twenty-one billion, two hundred eleven million, one hundred ten thousand, one hundred twelve".