121403641 has 4 divisors (see below), whose sum is σ = 121440384. Its totient is φ = 121366900.

The previous prime is 121403629. The next prime is 121403677. The reversal of 121403641 is 146304121.

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 121403641 - 2²¹ = 119306489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121403041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12865 + ... + 20206.

It is an arithmetic number, because the mean of its divisors is an integer number (30360096).

Almost surely, 2^121403641 is an apocalyptic number.

It is an amenable number.

121403641 is a deficient number, since it is larger than the sum of its proper divisors (36743).

121403641 is an equidigital number, since it uses as much as digits as its factorization.

121403641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36742.

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

The square root of 121403641 is about 11018.3320425553. The cubic root of 121403641 is about 495.1581183810.

Adding to 121403641 its reverse (146304121), we get a palindrome (267707762).

The spelling of 121403641 in words is "one hundred twenty-one million, four hundred three thousand, six hundred forty-one".