20020201021291 has 2 divisors, whose sum is σ = 20020201021292. Its totient is φ = 20020201021290.

The previous prime is 20020201021199. The next prime is 20020201021313. The reversal of 20020201021291 is 19212010202002.

It is an a-pointer prime, because the next prime (20020201021313) can be obtained adding 20020201021291 to its sum of digits (22).

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20020201021291 - 2⁹ = 20020201020779 is a prime.

It is not a weakly prime, because it can be changed into another prime (20020201021391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10010100510645 + 10010100510646.

It is an arithmetic number, because the mean of its divisors is an integer number (10010100510646).

Almost surely, 2^{20020201021291} is an apocalyptic number.

20020201021291 is a deficient number, since it is larger than the sum of its proper divisors (1).

20020201021291 is an equidigital number, since it uses as much as digits as its factorization.

20020201021291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 288, while the sum is 22.

Adding to 20020201021291 its reverse (19212010202002), we get a palindrome (39232211223293).

The spelling of 20020201021291 in words is "twenty trillion, twenty billion, two hundred one million, twenty-one thousand, two hundred ninety-one".