121755443232 has 192 divisors, whose sum is σ = 346928883840. Its totient is φ = 37247975424.

The previous prime is 121755443213. The next prime is 121755443263. The reversal of 121755443232 is 232344557121.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10597363 + ... + 10608845.

It is an arithmetic number, because the mean of its divisors is an integer number (1806921270).

Almost surely, 2^121755443232 is an apocalyptic number.

121755443232 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 121755443232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (173464441920).

121755443232 is an abundant number, since it is smaller than the sum of its proper divisors (225173440608).

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

121755443232 is a wasteful number, since it uses less digits than its factorization.

121755443232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11675 (or 11667 counting only the distinct ones).

The product of its digits is 201600, while the sum is 39.

The spelling of 121755443232 in words is "one hundred twenty-one billion, seven hundred fifty-five million, four hundred forty-three thousand, two hundred thirty-two".