121606111 has 8 divisors (see below), whose sum is σ = 132901200. Its totient is φ = 110351040.

The previous prime is 121606109. The next prime is 121606127. The reversal of 121606111 is 111606121.

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 121606111 - 2¹ = 121606109 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 (121606141) 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, 3456 + ... + 15973.

It is an arithmetic number, because the mean of its divisors is an integer number (16612650).

Almost surely, 2^121606111 is an apocalyptic number.

121606111 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

121606111 is a deficient number, since it is larger than the sum of its proper divisors (11295089).

121606111 is a wasteful number, since it uses less digits than its factorization.

121606111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20009.

The product of its (nonzero) digits is 72, while the sum is 19.

The square root of 121606111 is about 11027.5160847763. The cubic root of 121606111 is about 495.4332308955.

The spelling of 121606111 in words is "one hundred twenty-one million, six hundred six thousand, one hundred eleven".