2145486121 has 2 divisors, whose sum is σ = 2145486122. Its totient is φ = 2145486120.

The previous prime is 2145486103. The next prime is 2145486143. The reversal of 2145486121 is 1216845412.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1779911721 + 365574400 = 42189^2 + 19120^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2145486121 is a prime.

It is a super-2 number, since 2×2145486121² = 9206221390807253282, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2145483121) 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, 1072743060 + 1072743061.

It is an arithmetic number, because the mean of its divisors is an integer number (1072743061).

Almost surely, 2^2145486121 is an apocalyptic number.

It is an amenable number.

2145486121 is a deficient number, since it is larger than the sum of its proper divisors (1).

2145486121 is an equidigital number, since it uses as much as digits as its factorization.

2145486121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15360, while the sum is 34.

The square root of 2145486121 is about 46319.3924938573. The cubic root of 2145486121 is about 1289.7590081236.

The spelling of 2145486121 in words is "two billion, one hundred forty-five million, four hundred eighty-six thousand, one hundred twenty-one".