2121131 has 2 divisors, whose sum is σ = 2121132. Its totient is φ = 2121130.

The previous prime is 2121127. The next prime is 2121143. The reversal of 2121131 is 1311212.

2121131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a m-pointer prime, because the next prime (2121143) can be obtained adding 2121131 to its product of digits (12).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2121131 - 2² = 2121127 is a prime.

It is a super-2 number, since 2×2121131² = 8998393438322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2121121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060565 + 1060566.

It is an arithmetic number, because the mean of its divisors is an integer number (1060566).

2^2121131 is an apocalyptic number.

2121131 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121131 is an equidigital number, since it uses as much as digits as its factorization.

2121131 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12, while the sum is 11.

The square root of 2121131 is about 1456.4103130643. The cubic root of 2121131 is about 128.4860063390.

Adding to 2121131 its reverse (1311212), we get a palindrome (3432343).

The spelling of 2121131 in words is "two million, one hundred twenty-one thousand, one hundred thirty-one".