201020401423 has 2 divisors, whose sum is σ = 201020401424. Its totient is φ = 201020401422.

The previous prime is 201020401331. The next prime is 201020401427. The reversal of 201020401423 is 324104020102.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-201020401423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 201020401423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (201020401427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510200711 + 100510200712.

It is an arithmetic number, because the mean of its divisors is an integer number (100510200712).

Almost surely, 2^201020401423 is an apocalyptic number.

201020401423 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020401423 is an equidigital number, since it uses as much as digits as its factorization.

201020401423 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 384, while the sum is 19.

Adding to 201020401423 its reverse (324104020102), we get a palindrome (525124421525).

The spelling of 201020401423 in words is "two hundred one billion, twenty million, four hundred one thousand, four hundred twenty-three".