121243441 has 4 divisors (see below), whose sum is σ = 132265584. Its totient is φ = 110221300.

The previous prime is 121243399. The next prime is 121243457. The reversal of 121243441 is 144342121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 121243441 - 2¹⁵ = 121210673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121243481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5511055 + ... + 5511076.

It is an arithmetic number, because the mean of its divisors is an integer number (33066396).

Almost surely, 2^121243441 is an apocalyptic number.

121243441 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

121243441 is a deficient number, since it is larger than the sum of its proper divisors (11022143).

121243441 is a wasteful number, since it uses less digits than its factorization.

121243441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11022142.

The product of its digits is 768, while the sum is 22.

The square root of 121243441 is about 11011.0599398968. The cubic root of 121243441 is about 494.9402247311.

Adding to 121243441 its reverse (144342121), we get a palindrome (265585562).

The spelling of 121243441 in words is "one hundred twenty-one million, two hundred forty-three thousand, four hundred forty-one".