121045543056 has 135 divisors (see below), whose sum is σ = 344039204691. Its totient is φ = 39729223872.

The previous prime is 121045543051. The next prime is 121045543081. The reversal of 121045543056 is 650345540121.

The square root of 121045543056 is 347916.

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

121045543056 is a `hidden beast` number, since 1 + 2 + 104 + 5 + 543 + 0 + 5 + 6 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 121045543056.

It is not an unprimeable number, because it can be changed into a prime (121045543051) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 329824185 + ... + 329824551.

Almost surely, 2^121045543056 is an apocalyptic number.

121045543056 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

121045543056 is the 347916-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121045543056

121045543056 is an abundant number, since it is smaller than the sum of its proper divisors (222993661635).

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

121045543056 is an frugal number, since it uses more digits than its factorization.

121045543056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906 (or 451 counting only the distinct ones).

The product of its (nonzero) digits is 72000, while the sum is 36.

Multiplying 121045543056 by its sum of digits (36), we get a square (4357639550016 = 2087496²).

121045543056 divided by its sum of digits (36) gives a square (3362376196 = 57986²).

The spelling of 121045543056 in words is "one hundred twenty-one billion, forty-five million, five hundred forty-three thousand, fifty-six".