121020552 has 48 divisors (see below), whose sum is σ = 347047740. Its totient is φ = 37966848.

The previous prime is 121020547. The next prime is 121020553. The reversal of 121020552 is 255020121.

121020552 is a `hidden beast` number, since 12 + 102 + 0 + 552 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 108868356 + 12152196 = 10434^2 + 3486^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (121020553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48213 + ... + 50660.

Almost surely, 2^121020552 is an apocalyptic number.

121020552 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

121020552 is an abundant number, since it is smaller than the sum of its proper divisors (226027188).

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

121020552 is a wasteful number, since it uses less digits than its factorization.

121020552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98902 (or 98895 counting only the distinct ones).

The product of its (nonzero) digits is 200, while the sum is 18.

The square root of 121020552 is about 11000.9341421536. The cubic root of 121020552 is about 494.6367460423.

Adding to 121020552 its reverse (255020121), we get a palindrome (376040673).

The spelling of 121020552 in words is "one hundred twenty-one million, twenty thousand, five hundred fifty-two".