121894549956 has 27 divisors (see below), whose sum is σ = 308127629901. Its totient is φ = 40630818384.

The previous prime is 121894549921. The next prime is 121894549963. The reversal of 121894549956 is 659945498121.

The square root of 121894549956 is 349134.

It is a perfect power (a square), and thus also a powerful number.

121894549956 is a `hidden beast` number, since 1 + 2 + 1 + 8 + 94 + 5 + 499 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11484551556 + 110409998400 = 107166^2 + 332280^2 .

It is a junction number, because it is equal to n+sod(n) for n = 121894549893 and 121894549902.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2065710 + ... + 2123898.

Almost surely, 2^121894549956 is an apocalyptic number.

121894549956 is the 349134-th square number.

It is an amenable number.

121894549956 is an abundant number, since it is smaller than the sum of its proper divisors (186233079945).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

121894549956 is an frugal number, since it uses more digits than its factorization.

121894549956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116388 (or 58194 counting only the distinct ones).

The product of its digits is 27993600, while the sum is 63.

The spelling of 121894549956 in words is "one hundred twenty-one billion, eight hundred ninety-four million, five hundred forty-nine thousand, nine hundred fifty-six".