2101121 has 8 divisors (see below), whose sum is σ = 2304288. Its totient is φ = 1900000.

The previous prime is 2101111. The next prime is 2101123. The reversal of 2101121 is 1211012.

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 2101121 - 2¹⁰ = 2100097 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2101099 and 2101108.

It is not an unprimeable number, because it can be changed into a prime (2101123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2381 + ... + 3141.

It is an arithmetic number, because the mean of its divisors is an integer number (288036).

2^2101121 is an apocalyptic number.

It is an amenable number.

2101121 is a deficient number, since it is larger than the sum of its proper divisors (203167).

2101121 is a wasteful number, since it uses less digits than its factorization.

2101121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1023.

The product of its (nonzero) digits is 4, while the sum is 8.

The square root of 2101121 is about 1449.5244047618. The cubic root of 2101121 is about 128.0806986239.

Adding to 2101121 its reverse (1211012), we get a palindrome (3312133).

It can be divided in two parts, 2101 and 121, that added together give a palindrome (2222).

The spelling of 2101121 in words is "two million, one hundred one thousand, one hundred twenty-one".