121755443372 has 24 divisors (see below), whose sum is σ = 213718540560. Its totient is φ = 60693131520.

The previous prime is 121755443363. The next prime is 121755443437. The reversal of 121755443372 is 273344557121.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4195472 + ... + 4224392.

It is an arithmetic number, because the mean of its divisors is an integer number (8904939190).

Almost surely, 2^121755443372 is an apocalyptic number.

It is an amenable number.

121755443372 is a deficient number, since it is larger than the sum of its proper divisors (91963097188).

121755443372 is a wasteful number, since it uses less digits than its factorization.

121755443372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32081 (or 32079 counting only the distinct ones).

The product of its digits is 705600, while the sum is 44.

The spelling of 121755443372 in words is "one hundred twenty-one billion, seven hundred fifty-five million, four hundred forty-three thousand, three hundred seventy-two".