121755372208 has 10 divisors (see below), whose sum is σ = 235901033684. Its totient is φ = 60877686096.

The previous prime is 121755372191. The next prime is 121755372227. The reversal of 121755372208 is 802273557121.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3804855366 + ... + 3804855397.

Almost surely, 2^121755372208 is an apocalyptic number.

It is an amenable number.

121755372208 is a deficient number, since it is larger than the sum of its proper divisors (114145661476).

121755372208 is an equidigital number, since it uses as much as digits as its factorization.

121755372208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7609710771 (or 7609710765 counting only the distinct ones).

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 121755372208 in words is "one hundred twenty-one billion, seven hundred fifty-five million, three hundred seventy-two thousand, two hundred eight".