121009744512 has 96 divisors (see below), whose sum is σ = 349271264160. Its totient is φ = 40214592000.

The previous prime is 121009744487. The next prime is 121009744517. The reversal of 121009744512 is 215447900121.

121009744512 is a `hidden beast` number, since 1 + 2 + 10 + 0 + 97 + 44 + 512 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (121009744517) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 222637 + ... + 539987.

It is an arithmetic number, because the mean of its divisors is an integer number (3638242335).

Almost surely, 2^121009744512 is an apocalyptic number.

121009744512 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 121009744512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (174635632080).

121009744512 is an abundant number, since it is smaller than the sum of its proper divisors (228261519648).

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

121009744512 is a wasteful number, since it uses less digits than its factorization.

121009744512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 317702 (or 317687 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 121009744512 in words is "one hundred twenty-one billion, nine million, seven hundred forty-four thousand, five hundred twelve".