201020020291 has 2 divisors, whose sum is σ = 201020020292. Its totient is φ = 201020020290.

The previous prime is 201020020283. The next prime is 201020020339. The reversal of 201020020291 is 192020020102.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 201020020291 - 2³ = 201020020283 is a prime.

It is not a weakly prime, because it can be changed into another prime (201020020891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 100510010145 + 100510010146.

It is an arithmetic number, because the mean of its divisors is an integer number (100510010146).

Almost surely, 2^201020020291 is an apocalyptic number.

201020020291 is a deficient number, since it is larger than the sum of its proper divisors (1).

201020020291 is an equidigital number, since it uses as much as digits as its factorization.

201020020291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 201020020291 its reverse (192020020102), we get a palindrome (393040040393).

The spelling of 201020020291 in words is "two hundred one billion, twenty million, twenty thousand, two hundred ninety-one".