2121143511 has 16 divisors (see below), whose sum is σ = 2966436864. Its totient is φ = 1346599584.

The previous prime is 2121143509. The next prime is 2121143537. The reversal of 2121143511 is 1153411212.

It is not a de Polignac number, because 2121143511 - 2¹ = 2121143509 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2121143501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198075 + ... + 208508.

It is an arithmetic number, because the mean of its divisors is an integer number (185402304).

Almost surely, 2^2121143511 is an apocalyptic number.

2121143511 is a deficient number, since it is larger than the sum of its proper divisors (845293353).

2121143511 is a wasteful number, since it uses less digits than its factorization.

2121143511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 406670.

The product of its digits is 240, while the sum is 21.

The square root of 2121143511 is about 46055.8737947724. The cubic root of 2121143511 is about 1284.8625895348.

Adding to 2121143511 its reverse (1153411212), we get a palindrome (3274554723).

The spelling of 2121143511 in words is "two billion, one hundred twenty-one million, one hundred forty-three thousand, five hundred eleven".