2500501211281 has 2 divisors, whose sum is σ = 2500501211282. Its totient is φ = 2500501211280.

The previous prime is 2500501211167. The next prime is 2500501211407. The reversal of 2500501211281 is 1821121050052.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2118844140625 + 381657070656 = 1455625^2 + 617784^2 .

It is a cyclic number.

It is not a de Polignac number, because 2500501211281 - 2¹¹ = 2500501209233 is a prime.

It is a super-2 number, since 2×2500501211281² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2500501211881) 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, 1250250605640 + 1250250605641.

It is an arithmetic number, because the mean of its divisors is an integer number (1250250605641).

Almost surely, 2^{2500501211281} is an apocalyptic number.

It is an amenable number.

2500501211281 is a deficient number, since it is larger than the sum of its proper divisors (1).

2500501211281 is an equidigital number, since it uses as much as digits as its factorization.

2500501211281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1600, while the sum is 28.

The spelling of 2500501211281 in words is "two trillion, five hundred billion, five hundred one million, two hundred eleven thousand, two hundred eighty-one".