201020237213 has 2 divisors, whose sum is σ = 201020237214. Its totient is φ = 201020237212.

The previous prime is 201020237179. The next prime is 201020237219. The reversal of 201020237213 is 312732020102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 130406209924 + 70614027289 = 361118^2 + 265733^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201020237213 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201020237219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510118606 + 100510118607.

It is an arithmetic number, because the mean of its divisors is an integer number (100510118607).

Almost surely, 2^201020237213 is an apocalyptic number.

It is an amenable number.

201020237213 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020237213 is an equidigital number, since it uses as much as digits as its factorization.

201020237213 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 23.

Adding to 201020237213 its reverse (312732020102), we get a palindrome (513752257315).

The spelling of 201020237213 in words is "two hundred one billion, twenty million, two hundred thirty-seven thousand, two hundred thirteen".