121320641 has 8 divisors (see below), whose sum is σ = 130932480. Its totient is φ = 111748752.

The previous prime is 121320637. The next prime is 121320691. The reversal of 121320641 is 146023121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 121320641 - 2² = 121320637 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (121320631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3515 + ... + 15968.

It is an arithmetic number, because the mean of its divisors is an integer number (16366560).

Almost surely, 2^121320641 is an apocalyptic number.

It is an amenable number.

121320641 is a deficient number, since it is larger than the sum of its proper divisors (9611839).

121320641 is a wasteful number, since it uses less digits than its factorization.

121320641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19975.

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 121320641 is about 11014.5649482855. The cubic root of 121320641 is about 495.0452511092.

Adding to 121320641 its reverse (146023121), we get a palindrome (267343762).

The spelling of 121320641 in words is "one hundred twenty-one million, three hundred twenty thousand, six hundred forty-one".