121153512 has 64 divisors (see below), whose sum is σ = 318528000. Its totient is φ = 38326464.

The previous prime is 121153507. The next prime is 121153541. The reversal of 121153512 is 215351121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75939 + ... + 77517.

It is an arithmetic number, because the mean of its divisors is an integer number (4977000).

Almost surely, 2^121153512 is an apocalyptic number.

121153512 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 121153512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (159264000).

121153512 is an abundant number, since it is smaller than the sum of its proper divisors (197374488).

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

121153512 is a wasteful number, since it uses less digits than its factorization.

121153512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1750 (or 1746 counting only the distinct ones).

The product of its digits is 300, while the sum is 21.

The square root of 121153512 is about 11006.9756064052. The cubic root of 121153512 is about 494.8178250141.

The spelling of 121153512 in words is "one hundred twenty-one million, one hundred fifty-three thousand, five hundred twelve".