121042621 has 8 divisors (see below), whose sum is σ = 139060224. Its totient is φ = 103206480.

The previous prime is 121042609. The next prime is 121042627. The reversal of 121042621 is 126240121.

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 121042621 - 2⁵ = 121042589 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121042627) 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, 43930 + ... + 46603.

It is an arithmetic number, because the mean of its divisors is an integer number (17382528).

Almost surely, 2^121042621 is an apocalyptic number.

It is an amenable number.

121042621 is a deficient number, since it is larger than the sum of its proper divisors (18017603).

121042621 is an equidigital number, since it uses as much as digits as its factorization.

121042621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90731.

The product of its (nonzero) digits is 192, while the sum is 19.

The square root of 121042621 is about 11001.9371476118. The cubic root of 121042621 is about 494.6668111145. Note that the first 3 decimals are identical.

Adding to 121042621 its reverse (126240121), we get a palindrome (247282742).

The spelling of 121042621 in words is "one hundred twenty-one million, forty-two thousand, six hundred twenty-one".