121154971200 has 168 divisors, whose sum is σ = 398788871712. Its totient is φ = 32202362880.

The previous prime is 121154971199. The next prime is 121154971207. The reversal of 121154971200 is 2179451121.

It is not an unprimeable number, because it can be changed into a prime (121154971207) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1432492 + ... + 1514708.

It is an arithmetic number, because the mean of its divisors is an integer number (2373743284).

Almost surely, 2^121154971200 is an apocalyptic number.

121154971200 is a gapful number since it is divisible by the number (10) 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 121154971200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (199394435856).

121154971200 is an abundant number, since it is smaller than the sum of its proper divisors (277633900512).

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

121154971200 is a wasteful number, since it uses less digits than its factorization.

121154971200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82549 (or 82534 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 33.

The spelling of 121154971200 in words is "one hundred twenty-one billion, one hundred fifty-four million, nine hundred seventy-one thousand, two hundred".