121242104 has 8 divisors (see below), whose sum is σ = 227328960. Its totient is φ = 60621048.

The previous prime is 121242101. The next prime is 121242137. The reversal of 121242104 is 401242121.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121242101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7577624 + ... + 7577639.

It is an arithmetic number, because the mean of its divisors is an integer number (28416120).

Almost surely, 2^121242104 is an apocalyptic number.

It is an amenable number.

121242104 is a deficient number, since it is larger than the sum of its proper divisors (106086856).

121242104 is a wasteful number, since it uses less digits than its factorization.

121242104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15155269 (or 15155265 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 121242104 is about 11010.9992280447. Note that the first 3 decimals coincide. The cubic root of 121242104 is about 494.9384054230.

Adding to 121242104 its sum of digits (17), we get a palindrome (121242121).

Adding to 121242104 its reverse (401242121), we get a palindrome (522484225).

The spelling of 121242104 in words is "one hundred twenty-one million, two hundred forty-two thousand, one hundred four".