2121151211 has 2 divisors, whose sum is σ = 2121151212. Its totient is φ = 2121151210.

The previous prime is 2121151189. The next prime is 2121151267. The reversal of 2121151211 is 1121511212.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2121151211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2121151211.

It is not a weakly prime, because it can be changed into another prime (2121151411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060575605 + 1060575606.

It is an arithmetic number, because the mean of its divisors is an integer number (1060575606).

Almost surely, 2^2121151211 is an apocalyptic number.

2121151211 is a deficient number, since it is larger than the sum of its proper divisors (1).

2121151211 is an equidigital number, since it uses as much as digits as its factorization.

2121151211 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40, while the sum is 17.

The square root of 2121151211 is about 46055.9573888113. The cubic root of 2121151211 is about 1284.8641442670.

Adding to 2121151211 its reverse (1121511212), we get a palindrome (3242662423).

The spelling of 2121151211 in words is "two billion, one hundred twenty-one million, one hundred fifty-one thousand, two hundred eleven".