2530126407821 has 2 divisors, whose sum is σ = 2530126407822. Its totient is φ = 2530126407820.

The previous prime is 2530126407797. The next prime is 2530126407841. The reversal of 2530126407821 is 1287046210352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2326878718921 + 203247688900 = 1525411^2 + 450830^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2530126407821 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2530126407841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1265063203910 + 1265063203911.

It is an arithmetic number, because the mean of its divisors is an integer number (1265063203911).

Almost surely, 2^{2530126407821} is an apocalyptic number.

It is an amenable number.

2530126407821 is a deficient number, since it is larger than the sum of its proper divisors (1).

2530126407821 is an equidigital number, since it uses as much as digits as its factorization.

2530126407821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 161280, while the sum is 41.

The spelling of 2530126407821 in words is "two trillion, five hundred thirty billion, one hundred twenty-six million, four hundred seven thousand, eight hundred twenty-one".