121103021 has 8 divisors (see below), whose sum is σ = 130519200. Its totient is φ = 111701232.

The previous prime is 121102999. The next prime is 121103023. The reversal of 121103021 is 120301121.

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

It is a cyclic number.

It is not a de Polignac number, because 121103021 - 2¹⁰ = 121101997 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121102993 and 121103011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121103023) 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 7 ways as a sum of consecutive naturals, for example, 19346 + ... + 24828.

It is an arithmetic number, because the mean of its divisors is an integer number (16314900).

Almost surely, 2^121103021 is an apocalyptic number.

It is an amenable number.

121103021 is a deficient number, since it is larger than the sum of its proper divisors (9416179).

121103021 is a wasteful number, since it uses less digits than its factorization.

121103021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7195.

The product of its (nonzero) digits is 12, while the sum is 11.

The square root of 121103021 is about 11004.6817764077. The cubic root of 121103021 is about 494.7490766472.

Adding to 121103021 its reverse (120301121), we get a palindrome (241404142).

The spelling of 121103021 in words is "one hundred twenty-one million, one hundred three thousand, twenty-one".