121055666 has 16 divisors (see below), whose sum is σ = 185147424. Its totient is φ = 59350944.

The previous prime is 121055663. The next prime is 121055677. The reversal of 121055666 is 666550121.

It is not an unprimeable number, because it can be changed into a prime (121055663) 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, 20081 + ... + 25403.

It is an arithmetic number, because the mean of its divisors is an integer number (11571714).

Almost surely, 2^121055666 is an apocalyptic number.

121055666 is a deficient number, since it is larger than the sum of its proper divisors (64091758).

121055666 is a wasteful number, since it uses less digits than its factorization.

121055666 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5545.

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

The square root of 121055666 is about 11002.5299817815. The cubic root of 121055666 is about 494.6845808793.

It can be divided in two parts, 12105 and 5666, that added together give a palindrome (17771).

The spelling of 121055666 in words is "one hundred twenty-one million, fifty-five thousand, six hundred sixty-six".