121099 has 8 divisors (see below), whose sum is σ = 134640. Its totient is φ = 108000.

The previous prime is 121081. The next prime is 121123. The reversal of 121099 is 990121.

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 121099 - 2⁵ = 121067 is a prime.

It is a plaindrome in base 5.

It is not an unprimeable number, because it can be changed into a prime (121019) 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, 1057 + ... + 1165.

It is an arithmetic number, because the mean of its divisors is an integer number (16830).

2¹²¹⁰⁹⁹ is an apocalyptic number.

121099 is a deficient number, since it is larger than the sum of its proper divisors (13541).

121099 is a wasteful number, since it uses less digits than its factorization.

121099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221.

The product of its (nonzero) digits is 162, while the sum is 22.

The square root of 121099 is about 347.9928160178. The cubic root of 121099 is about 49.4743600846.

Adding to 121099 its sum of digits (22), we get a palindrome (121121).

It can be divided in two parts, 12 and 1099, that added together give a palindrome (1111).

The spelling of 121099 in words is "one hundred twenty-one thousand, ninety-nine".