121840102 has 8 divisors (see below), whose sum is σ = 183472056. Its totient is φ = 60682752.

The previous prime is 121840093. The next prime is 121840123. The reversal of 121840102 is 201048121.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 121840102.

It is a congruent number.

It is an unprimeable number.

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 in 3 ways as a sum of consecutive naturals, for example, 118008 + ... + 119035.

It is an arithmetic number, because the mean of its divisors is an integer number (22934007).

Almost surely, 2^121840102 is an apocalyptic number.

121840102 is a deficient number, since it is larger than the sum of its proper divisors (61631954).

121840102 is a wasteful number, since it uses less digits than its factorization.

121840102 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 237302.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 121840102 is about 11038.1204015901. The cubic root of 121840102 is about 495.7507934509.

Adding to 121840102 its reverse (201048121), we get a palindrome (322888223).

The spelling of 121840102 in words is "one hundred twenty-one million, eight hundred forty thousand, one hundred two".