2128011481 has 2 divisors, whose sum is σ = 2128011482. Its totient is φ = 2128011480.

The previous prime is 2128011467. The next prime is 2128011541. The reversal of 2128011481 is 1841108212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1891467081 + 236544400 = 43491^2 + 15380^2 .

It is a cyclic number.

It is not a de Polignac number, because 2128011481 - 2¹⁷ = 2127880409 is a prime.

It is a super-2 number, since 2×2128011481² = 9056865726535626722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2128011401) 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 as a sum of consecutive naturals, namely, 1064005740 + 1064005741.

It is an arithmetic number, because the mean of its divisors is an integer number (1064005741).

Almost surely, 2^2128011481 is an apocalyptic number.

It is an amenable number.

2128011481 is a deficient number, since it is larger than the sum of its proper divisors (1).

2128011481 is an equidigital number, since it uses as much as digits as its factorization.

2128011481 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1024, while the sum is 28.

The square root of 2128011481 is about 46130.3748196348. The cubic root of 2128011481 is about 1286.2478314586.

Adding to 2128011481 its reverse (1841108212), we get a palindrome (3969119693).

It can be divided in two parts, 21280 and 11481, that added together give a square (32761 = 181²).

The spelling of 2128011481 in words is "two billion, one hundred twenty-eight million, eleven thousand, four hundred eighty-one".