121004021 has 8 divisors (see below), whose sum is σ = 124000800. Its totient is φ = 118015632.

The previous prime is 121003999. The next prime is 121004041. The reversal of 121004021 is 120400121.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-121004021 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121003993 and 121004011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121004041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35030 + ... + 38328.

It is an arithmetic number, because the mean of its divisors is an integer number (15500100).

Almost surely, 2^121004021 is an apocalyptic number.

It is an amenable number.

121004021 is a deficient number, since it is larger than the sum of its proper divisors (2996779).

121004021 is an equidigital number, since it uses as much as digits as its factorization.

121004021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4195.

The product of its (nonzero) digits is 16, while the sum is 11.

The square root of 121004021 is about 11000.1827712088. The cubic root of 121004021 is about 494.6142231120.

Adding to 121004021 its reverse (120400121), we get a palindrome (241404142).

The spelling of 121004021 in words is "one hundred twenty-one million, four thousand, twenty-one".