121043641 has 4 divisors (see below), whose sum is σ = 126306432. Its totient is φ = 115780852.

The previous prime is 121043639. The next prime is 121043647. The reversal of 121043641 is 146340121.

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 121043641 - 2¹ = 121043639 is a prime.

It is not an unprimeable number, because it can be changed into a prime (121043647) 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, 2631361 + ... + 2631406.

It is an arithmetic number, because the mean of its divisors is an integer number (31576608).

Almost surely, 2^121043641 is an apocalyptic number.

It is an amenable number.

121043641 is a deficient number, since it is larger than the sum of its proper divisors (5262791).

121043641 is an equidigital number, since it uses as much as digits as its factorization.

121043641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5262790.

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 121043641 is about 11001.9835029871. The cubic root of 121043641 is about 494.6682005940.

Adding to 121043641 its reverse (146340121), we get a palindrome (267383762).

The spelling of 121043641 in words is "one hundred twenty-one million, forty-three thousand, six hundred forty-one".