121609311 has 8 divisors (see below), whose sum is σ = 167376384. Its totient is φ = 78457560.

The previous prime is 121609309. The next prime is 121609331. The reversal of 121609311 is 113906121.

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

It is not a de Polignac number, because 121609311 - 2¹ = 121609309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121609331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 653721 + ... + 653906.

It is an arithmetic number, because the mean of its divisors is an integer number (20922048).

Almost surely, 2^121609311 is an apocalyptic number.

121609311 is a deficient number, since it is larger than the sum of its proper divisors (45767073).

121609311 is a wasteful number, since it uses less digits than its factorization.

121609311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1307661.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 121609311 is about 11027.6611754261. The cubic root of 121609311 is about 495.4375765445.

The spelling of 121609311 in words is "one hundred twenty-one million, six hundred nine thousand, three hundred eleven".