2154122011 has 2 divisors, whose sum is σ = 2154122012. Its totient is φ = 2154122010.

The previous prime is 2154121997. The next prime is 2154122077. The reversal of 2154122011 is 1102214512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2154122011 - 2¹⁵ = 2154089243 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2154122011.

It is not a weakly prime, because it can be changed into another prime (2154122081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1077061005 + 1077061006.

It is an arithmetic number, because the mean of its divisors is an integer number (1077061006).

Almost surely, 2^2154122011 is an apocalyptic number.

2154122011 is a deficient number, since it is larger than the sum of its proper divisors (1).

2154122011 is an equidigital number, since it uses as much as digits as its factorization.

2154122011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 160, while the sum is 19.

The square root of 2154122011 is about 46412.5199811430. The cubic root of 2154122011 is about 1291.4871799402.

Adding to 2154122011 its reverse (1102214512), we get a palindrome (3256336523).

The spelling of 2154122011 in words is "two billion, one hundred fifty-four million, one hundred twenty-two thousand, eleven".