2051251062521 has 2 divisors, whose sum is σ = 2051251062522. Its totient is φ = 2051251062520.

The previous prime is 2051251062481. The next prime is 2051251062529. The reversal of 2051251062521 is 1252601521502.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1421672290921 + 629578771600 = 1192339^2 + 793460^2 .

It is a cyclic number.

It is not a de Polignac number, because 2051251062521 - 2²² = 2051246868217 is a prime.

It is not a weakly prime, because it can be changed into another prime (2051251062529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1025625531260 + 1025625531261.

It is an arithmetic number, because the mean of its divisors is an integer number (1025625531261).

Almost surely, 2^{2051251062521} is an apocalyptic number.

It is an amenable number.

2051251062521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2051251062521 is an equidigital number, since it uses as much as digits as its factorization.

2051251062521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12000, while the sum is 32.

The spelling of 2051251062521 in words is "two trillion, fifty-one billion, two hundred fifty-one million, sixty-two thousand, five hundred twenty-one".