201420124517 has 2 divisors, whose sum is σ = 201420124518. Its totient is φ = 201420124516.

The previous prime is 201420124393. The next prime is 201420124531. The reversal of 201420124517 is 715421024102.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 157616146081 + 43803978436 = 397009^2 + 209294^2 .

It is a cyclic number.

It is not a de Polignac number, because 201420124517 - 2¹⁸ = 201419862373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201420124517.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201420124547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100710062258 + 100710062259.

It is an arithmetic number, because the mean of its divisors is an integer number (100710062259).

Almost surely, 2^201420124517 is an apocalyptic number.

It is an amenable number.

201420124517 is a deficient number, since it is larger than the sum of its proper divisors (1).

201420124517 is an equidigital number, since it uses as much as digits as its factorization.

201420124517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4480, while the sum is 29.

Adding to 201420124517 its reverse (715421024102), we get a palindrome (916841148619).

The spelling of 201420124517 in words is "two hundred one billion, four hundred twenty million, one hundred twenty-four thousand, five hundred seventeen".