121121441 has 4 divisors (see below), whose sum is σ = 138424512. Its totient is φ = 103818372.

The previous prime is 121121431. The next prime is 121121467. The reversal of 121121441 is 144121121.

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 not a de Polignac number, because 121121441 - 2²² = 116927137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121121401) 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, 8651525 + ... + 8651538.

It is an arithmetic number, because the mean of its divisors is an integer number (34606128).

Almost surely, 2^121121441 is an apocalyptic number.

It is an amenable number.

121121441 is a deficient number, since it is larger than the sum of its proper divisors (17303071).

121121441 is an equidigital number, since it uses as much as digits as its factorization.

121121441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17303070.

The product of its digits is 64, while the sum is 17.

The square root of 121121441 is about 11005.5186611082. The cubic root of 121121441 is about 494.7741594676.

Adding to 121121441 its reverse (144121121), we get a palindrome (265242562).

The spelling of 121121441 in words is "one hundred twenty-one million, one hundred twenty-one thousand, four hundred forty-one".