2121411157 has 4 divisors (see below), whose sum is σ = 2121520140. Its totient is φ = 2121302176.

The previous prime is 2121411143. The next prime is 2121411197. The reversal of 2121411157 is 7511141212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 221235876 + 1900175281 = 14874^2 + 43591^2 .

It is a cyclic number.

It is not a de Polignac number, because 2121411157 - 2¹⁹ = 2120886869 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 (2121411137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16432 + ... + 67177.

It is an arithmetic number, because the mean of its divisors is an integer number (530380035).

Almost surely, 2^2121411157 is an apocalyptic number.

It is an amenable number.

2121411157 is a deficient number, since it is larger than the sum of its proper divisors (108983).

2121411157 is an equidigital number, since it uses as much as digits as its factorization.

2121411157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108982.

The product of its digits is 560, while the sum is 25.

The square root of 2121411157 is about 46058.7793694101. The cubic root of 2121411157 is about 1284.9166286051.

Adding to 2121411157 its reverse (7511141212), we get a palindrome (9632552369).

The spelling of 2121411157 in words is "two billion, one hundred twenty-one million, four hundred eleven thousand, one hundred fifty-seven".