121241021 has 8 divisors (see below), whose sum is σ = 132600864. Its totient is φ = 109937520.

The previous prime is 121241009. The next prime is 121241041. The reversal of 121241021 is 120142121.

It is a happy number.

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

It is not a de Polignac number, because 121241021 - 2¹⁰ = 121239997 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 121240987 and 121241005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121241041) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9515 + ... + 18248.

It is an arithmetic number, because the mean of its divisors is an integer number (16575108).

Almost surely, 2^121241021 is an apocalyptic number.

121241021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121241021 is a deficient number, since it is larger than the sum of its proper divisors (11359843).

121241021 is a wasteful number, since it uses less digits than its factorization.

121241021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28171.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 121241021 is about 11010.9500498368. The cubic root of 121241021 is about 494.9369317328.

Adding to 121241021 its reverse (120142121), we get a palindrome (241383142).

It can be divided in two parts, 121 and 241021, that added together give a palindrome (241142).

The spelling of 121241021 in words is "one hundred twenty-one million, two hundred forty-one thousand, twenty-one".