2126012501 has 2 divisors, whose sum is σ = 2126012502. Its totient is φ = 2126012500.

The previous prime is 2126012491. The next prime is 2126012513. The reversal of 2126012501 is 1052106212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1812545476 + 313467025 = 42574^2 + 17705^2 .

It is a cyclic number.

It is not a de Polignac number, because 2126012501 - 2⁶ = 2126012437 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2126012101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1063006250 + 1063006251.

It is an arithmetic number, because the mean of its divisors is an integer number (1063006251).

Almost surely, 2^2126012501 is an apocalyptic number.

It is an amenable number.

2126012501 is a deficient number, since it is larger than the sum of its proper divisors (1).

2126012501 is an equidigital number, since it uses as much as digits as its factorization.

2126012501 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 2126012501 is about 46108.7030938846. The cubic root of 2126012501 is about 1285.8449531178.

Adding to 2126012501 its reverse (1052106212), we get a palindrome (3178118713).

The spelling of 2126012501 in words is "two billion, one hundred twenty-six million, twelve thousand, five hundred one".