121066655 has 16 divisors (see below), whose sum is σ = 147944064. Its totient is φ = 95087520.

The previous prime is 121066633. The next prime is 121066657. The reversal of 121066655 is 556660121.

It is not a de Polignac number, because 121066655 - 2²² = 116872351 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121066657) 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 15 ways as a sum of consecutive naturals, for example, 174860 + ... + 175550.

It is an arithmetic number, because the mean of its divisors is an integer number (9246504).

Almost surely, 2^121066655 is an apocalyptic number.

121066655 is a deficient number, since it is larger than the sum of its proper divisors (26877409).

121066655 is an equidigital number, since it uses as much as digits as its factorization.

121066655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1286.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 121066655 is about 11003.0293555911. The cubic root of 121066655 is about 494.6995489916.

The spelling of 121066655 in words is "one hundred twenty-one million, sixty-six thousand, six hundred fifty-five".