121005045 has 24 divisors (see below), whose sum is σ = 239705856. Its totient is φ = 55316448.

The previous prime is 121005043. The next prime is 121005089. The reversal of 121005045 is 540500121.

It is not a de Polignac number, because 121005045 - 2¹ = 121005043 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121005043) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 191757 + ... + 192386.

It is an arithmetic number, because the mean of its divisors is an integer number (9987744).

Almost surely, 2^121005045 is an apocalyptic number.

121005045 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

121005045 is a deficient number, since it is larger than the sum of its proper divisors (118700811).

121005045 is a wasteful number, since it uses less digits than its factorization.

121005045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 384161 (or 384158 counting only the distinct ones).

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

The square root of 121005045 is about 11000.2293157916. The cubic root of 121005045 is about 494.6156183371.

Adding to 121005045 its reverse (540500121), we get a palindrome (661505166).

The spelling of 121005045 in words is "one hundred twenty-one million, five thousand, forty-five".