2141121005 has 4 divisors (see below), whose sum is σ = 2569345212. Its totient is φ = 1712896800.

The previous prime is 2141120987. The next prime is 2141121007. The reversal of 2141121005 is 5001211412.

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

It can be written as a sum of positive squares in 2 ways, for example, as 358761481 + 1782359524 = 18941^2 + 42218^2 .

It is not a de Polignac number, because 2141121005 - 2¹⁸ = 2140858861 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2141121007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 214112096 + ... + 214112105.

It is an arithmetic number, because the mean of its divisors is an integer number (642336303).

Almost surely, 2^2141121005 is an apocalyptic number.

It is an amenable number.

2141121005 is a deficient number, since it is larger than the sum of its proper divisors (428224207).

2141121005 is an equidigital number, since it uses as much as digits as its factorization.

2141121005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 428224206.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 2141121005 is about 46272.2487566792. The cubic root of 2141121005 is about 1288.8837177329.

Adding to 2141121005 its reverse (5001211412), we get a palindrome (7142332417).

The spelling of 2141121005 in words is "two billion, one hundred forty-one million, one hundred twenty-one thousand, five".