2120825281 has 2 divisors, whose sum is σ = 2120825282. Its totient is φ = 2120825280.

The previous prime is 2120825261. The next prime is 2120825347. The reversal of 2120825281 is 1825280212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1485331600 + 635493681 = 38540^2 + 25209^2 .

It is a cyclic number.

It is not a de Polignac number, because 2120825281 - 2⁵ = 2120825249 is a prime.

It is a super-2 number, since 2×2120825281² = 8995799745057457922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2120825251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1060412640 + 1060412641.

It is an arithmetic number, because the mean of its divisors is an integer number (1060412641).

Almost surely, 2^2120825281 is an apocalyptic number.

It is an amenable number.

2120825281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2120825281 is an equidigital number, since it uses as much as digits as its factorization.

2120825281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5120, while the sum is 31.

The square root of 2120825281 is about 46052.4188398395. The cubic root of 2120825281 is about 1284.7983313852.

The spelling of 2120825281 in words is "two billion, one hundred twenty million, eight hundred twenty-five thousand, two hundred eighty-one".