121773128 has 32 divisors (see below), whose sum is σ = 243408000. Its totient is φ = 56946240.

The previous prime is 121773077. The next prime is 121773131. The reversal of 121773128 is 821377121.

It is a junction number, because it is equal to n+sod(n) for n = 121773094 and 121773103.

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, 6938 + ... + 17078.

It is an arithmetic number, because the mean of its divisors is an integer number (7606500).

Almost surely, 2^121773128 is an apocalyptic number.

It is an amenable number.

121773128 is a deficient number, since it is larger than the sum of its proper divisors (121634872).

121773128 is a wasteful number, since it uses less digits than its factorization.

121773128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10245 (or 10241 counting only the distinct ones).

The product of its digits is 4704, while the sum is 32.

The square root of 121773128 is about 11035.0862253088. The cubic root of 121773128 is about 495.6599407716.

The spelling of 121773128 in words is "one hundred twenty-one million, seven hundred seventy-three thousand, one hundred twenty-eight".