121164999 has 4 divisors (see below), whose sum is σ = 161553336. Its totient is φ = 80776664.

The previous prime is 121164997. The next prime is 121165003. The reversal of 121164999 is 999461121.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 121164999 - 2¹ = 121164997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 121164999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (121164997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20194164 + ... + 20194169.

It is an arithmetic number, because the mean of its divisors is an integer number (40388334).

Almost surely, 2^121164999 is an apocalyptic number.

121164999 is a deficient number, since it is larger than the sum of its proper divisors (40388337).

121164999 is an equidigital number, since it uses as much as digits as its factorization.

121164999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40388336.

The product of its digits is 34992, while the sum is 42.

The square root of 121164999 is about 11007.4973995000. The cubic root of 121164999 is about 494.8334630055.

The spelling of 121164999 in words is "one hundred twenty-one million, one hundred sixty-four thousand, nine hundred ninety-nine".