121755717124 has 6 divisors (see below), whose sum is σ = 213072504974. Its totient is φ = 60877858560.

The previous prime is 121755717091. The next prime is 121755717137. The reversal of 121755717124 is 421717557121.

It can be written as a sum of positive squares in only one way, i.e., 74049294400 + 47706422724 = 272120^2 + 218418^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15219464637 + ... + 15219464644.

Almost surely, 2^121755717124 is an apocalyptic number.

It is an amenable number.

121755717124 is a deficient number, since it is larger than the sum of its proper divisors (91316787850).

121755717124 is a wasteful number, since it uses less digits than its factorization.

121755717124 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30438929285 (or 30438929283 counting only the distinct ones).

The product of its digits is 137200, while the sum is 43.

The spelling of 121755717124 in words is "one hundred twenty-one billion, seven hundred fifty-five million, seven hundred seventeen thousand, one hundred twenty-four".