121441421 has 4 divisors (see below), whose sum is σ = 128585052. Its totient is φ = 114297792.

The previous prime is 121441409. The next prime is 121441433. The reversal of 121441421 is 124144121.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (121441409) and next prime (121441433).

It can be written as a sum of positive squares in 2 ways, for example, as 97812100 + 23629321 = 9890^2 + 4861^2 .

It is a cyclic number.

It is not a de Polignac number, because 121441421 - 2¹⁴ = 121425037 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 121441393 and 121441402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121441451) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3571790 + ... + 3571823.

It is an arithmetic number, because the mean of its divisors is an integer number (32146263).

Almost surely, 2^121441421 is an apocalyptic number.

It is an amenable number.

121441421 is a deficient number, since it is larger than the sum of its proper divisors (7143631).

121441421 is an equidigital number, since it uses as much as digits as its factorization.

121441421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7143630.

The product of its digits is 256, while the sum is 20.

The square root of 121441421 is about 11020.0463247665. The cubic root of 121441421 is about 495.2094763507.

Adding to 121441421 its reverse (124144121), we get a palindrome (245585542).

The spelling of 121441421 in words is "one hundred twenty-one million, four hundred forty-one thousand, four hundred twenty-one".