2099121 has 8 divisors (see below), whose sum is σ = 2874624. Its totient is φ = 1361520.

The previous prime is 2099093. The next prime is 2099129. The reversal of 2099121 is 1219902.

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

It is not a de Polignac number, because 2099121 - 2⁵ = 2099089 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 2099091 and 2099100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2099129) 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, 9345 + ... + 9566.

It is an arithmetic number, because the mean of its divisors is an integer number (359328).

2^2099121 is an apocalyptic number.

It is an amenable number.

2099121 is a deficient number, since it is larger than the sum of its proper divisors (775503).

2099121 is a wasteful number, since it uses less digits than its factorization.

2099121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18951.

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

The square root of 2099121 is about 1448.8343590625. The cubic root of 2099121 is about 128.0400468769.

It can be divided in two parts, 20991 and 21, that added together give a palindrome (21012).

The spelling of 2099121 in words is "two million, ninety-nine thousand, one hundred twenty-one".