121908698050 has 24 divisors (see below), whose sum is σ = 226819804032. Its totient is φ = 48748506000.

The previous prime is 121908698029. The next prime is 121908698053. The reversal of 121908698050 is 50896809121.

It is a hoax number, since the sum of its digits (49) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 121908697985 and 121908698003.

It is not an unprimeable number, because it can be changed into a prime (121908698053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209146 + ... + 536245.

It is an arithmetic number, because the mean of its divisors is an integer number (9450825168).

Almost surely, 2^121908698050 is an apocalyptic number.

121908698050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

121908698050 is a deficient number, since it is larger than the sum of its proper divisors (104911105982).

121908698050 is a wasteful number, since it uses less digits than its factorization.

121908698050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 748674 (or 748669 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 49.

The spelling of 121908698050 in words is "one hundred twenty-one billion, nine hundred eight million, six hundred ninety-eight thousand, fifty".