2031012521 has 2 divisors, whose sum is σ = 2031012522. Its totient is φ = 2031012520.

The previous prime is 2031012517. The next prime is 2031012527. The reversal of 2031012521 is 1252101302.

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., 1972336921 + 58675600 = 44411^2 + 7660^2 .

It is a cyclic number.

It is not a de Polignac number, because 2031012521 - 2² = 2031012517 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2031012521.

It is not a weakly prime, because it can be changed into another prime (2031012527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1015506260 + 1015506261.

It is an arithmetic number, because the mean of its divisors is an integer number (1015506261).

Almost surely, 2^2031012521 is an apocalyptic number.

It is an amenable number.

2031012521 is a deficient number, since it is larger than the sum of its proper divisors (1).

2031012521 is an equidigital number, since it uses as much as digits as its factorization.

2031012521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120, while the sum is 17.

The square root of 2031012521 is about 45066.7562733330. The cubic root of 2031012521 is about 1266.3998981682.

Adding to 2031012521 its reverse (1252101302), we get a palindrome (3283113823).

The spelling of 2031012521 in words is "two billion, thirty-one million, twelve thousand, five hundred twenty-one".