121055544 has 48 divisors (see below), whose sum is σ = 330782400. Its totient is φ = 39992064.

The previous prime is 121055531. The next prime is 121055549. The reversal of 121055544 is 445550121.

121055544 is a `hidden beast` number, since 1 + 2 + 105 + 554 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121055549) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 697 + ... + 15575.

It is an arithmetic number, because the mean of its divisors is an integer number (6891300).

Almost surely, 2^121055544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 121055544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (165391200).

121055544 is an abundant number, since it is smaller than the sum of its proper divisors (209726856).

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

121055544 is a wasteful number, since it uses less digits than its factorization.

121055544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15004 (or 14997 counting only the distinct ones).

The product of its (nonzero) digits is 4000, while the sum is 27.

The square root of 121055544 is about 11002.5244376007. The cubic root of 121055544 is about 494.6844146981.

The spelling of 121055544 in words is "one hundred twenty-one million, fifty-five thousand, five hundred forty-four".