121442621 has 12 divisors (see below), whose sum is σ = 127778112. Its totient is φ = 115356528.

The previous prime is 121442603. The next prime is 121442627. The reversal of 121442621 is 126244121.

It is not a de Polignac number, because 121442621 - 2¹⁴ = 121426237 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121442627) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 57836 + ... + 59898.

It is an arithmetic number, because the mean of its divisors is an integer number (10648176).

Almost surely, 2^121442621 is an apocalyptic number.

It is an amenable number.

121442621 is a deficient number, since it is larger than the sum of its proper divisors (6335491).

121442621 is an equidigital number, since it uses as much as digits as its factorization.

121442621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2180 (or 2143 counting only the distinct ones).

The product of its digits is 768, while the sum is 23.

The square root of 121442621 is about 11020.1007708641. The cubic root of 121442621 is about 495.2111074510.

Adding to 121442621 its reverse (126244121), we get a palindrome (247686742).

The spelling of 121442621 in words is "one hundred twenty-one million, four hundred forty-two thousand, six hundred twenty-one".