650500712021 has 2 divisors, whose sum is σ = 650500712022. Its totient is φ = 650500712020.

The previous prime is 650500712003. The next prime is 650500712087. The reversal of 650500712021 is 120217005056.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 643316284900 + 7184427121 = 802070^2 + 84761^2 .

It is a cyclic number.

It is not a de Polignac number, because 650500712021 - 2¹⁰ = 650500710997 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 (650500712621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 325250356010 + 325250356011.

It is an arithmetic number, because the mean of its divisors is an integer number (325250356011).

Almost surely, 2^650500712021 is an apocalyptic number.

It is an amenable number.

650500712021 is a deficient number, since it is larger than the sum of its proper divisors (1).

650500712021 is an equidigital number, since it uses as much as digits as its factorization.

650500712021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4200, while the sum is 29.

Adding to 650500712021 its reverse (120217005056), we get a palindrome (770717717077).

The spelling of 650500712021 in words is "six hundred fifty billion, five hundred million, seven hundred twelve thousand, twenty-one".