121548943845 has 128 divisors (see below), whose sum is σ = 250548756480. Its totient is φ = 55444544064.

The previous prime is 121548943771. The next prime is 121548943861. The reversal of 121548943845 is 548349845121.

121548943845 is a `hidden beast` number, since 1 + 2 + 1 + 548 + 94 + 3 + 8 + 4 + 5 = 666.

It is not a de Polignac number, because 121548943845 - 2¹⁷ = 121548812773 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121548943791 and 121548943800.

It is a congruent number.

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 127 ways as a sum of consecutive naturals, for example, 41868664 + ... + 41871566.

It is an arithmetic number, because the mean of its divisors is an integer number (1957412160).

Almost surely, 2^121548943845 is an apocalyptic number.

121548943845 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121548943845 is an abundant number, since it is smaller than the sum of its proper divisors (128999812635).

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

121548943845 is an frugal number, since it uses more digits than its factorization.

121548943845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3483 (or 3465 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 54.

The spelling of 121548943845 in words is "one hundred twenty-one billion, five hundred forty-eight million, nine hundred forty-three thousand, eight hundred forty-five".