121326021 has 24 divisors (see below), whose sum is σ = 177914880. Its totient is φ = 79664256.

The previous prime is 121326017. The next prime is 121326041. The reversal of 121326021 is 120623121.

It is not a de Polignac number, because 121326021 - 2² = 121326017 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 121325985 and 121326003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121326041) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 204301 + ... + 204893.

It is an arithmetic number, because the mean of its divisors is an integer number (7413120).

Almost surely, 2^121326021 is an apocalyptic number.

It is an amenable number.

121326021 is a deficient number, since it is larger than the sum of its proper divisors (56588859).

121326021 is a wasteful number, since it uses less digits than its factorization.

121326021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 905 (or 902 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 121326021 is about 11014.8091676615. The cubic root of 121326021 is about 495.0525686442.

Adding to 121326021 its reverse (120623121), we get a palindrome (241949142).

The spelling of 121326021 in words is "one hundred twenty-one million, three hundred twenty-six thousand, twenty-one".