121320655 has 8 divisors (see below), whose sum is σ = 146045952. Its totient is φ = 96749088.

The previous prime is 121320637. The next prime is 121320691. The reversal of 121320655 is 556023121.

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 121320655 - 2⁵ = 121320623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 36687 + ... + 39856.

It is an arithmetic number, because the mean of its divisors is an integer number (18255744).

Almost surely, 2^121320655 is an apocalyptic number.

121320655 is a deficient number, since it is larger than the sum of its proper divisors (24725297).

121320655 is an equidigital number, since it uses as much as digits as its factorization.

121320655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76865.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 121320655 is about 11014.5655838077. The cubic root of 121320655 is about 495.0452701514.

Adding to 121320655 its reverse (556023121), we get a palindrome (677343776).

The spelling of 121320655 in words is "one hundred twenty-one million, three hundred twenty thousand, six hundred fifty-five".