121112552512 has 112 divisors (see below), whose sum is σ = 276140298112. Its totient is φ = 51627663360.

The previous prime is 121112552507. The next prime is 121112552557. The reversal of 121112552512 is 215255211121.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (28).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81666523 + ... + 81668005.

It is an arithmetic number, because the mean of its divisors is an integer number (2465538376).

Almost surely, 2^121112552512 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121112552512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (138070149056).

121112552512 is an abundant number, since it is smaller than the sum of its proper divisors (155027745600).

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

121112552512 is a wasteful number, since it uses less digits than its factorization.

121112552512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2356 (or 2346 counting only the distinct ones).

The product of its digits is 2000, while the sum is 28.

Adding to 121112552512 its reverse (215255211121), we get a palindrome (336367763633).

The spelling of 121112552512 in words is "one hundred twenty-one billion, one hundred twelve million, five hundred fifty-two thousand, five hundred twelve".