20011201111271 has 2 divisors, whose sum is σ = 20011201111272. Its totient is φ = 20011201111270.

The previous prime is 20011201111201. The next prime is 20011201111303. The reversal of 20011201111271 is 17211110211002.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20011201111271 - 2¹⁰ = 20011201110247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011201111201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005600555635 + 10005600555636.

It is an arithmetic number, because the mean of its divisors is an integer number (10005600555636).

Almost surely, 2^{20011201111271} is an apocalyptic number.

20011201111271 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011201111271 is an equidigital number, since it uses as much as digits as its factorization.

20011201111271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56, while the sum is 20.

Adding to 20011201111271 its reverse (17211110211002), we get a palindrome (37222311322273).

The spelling of 20011201111271 in words is "twenty trillion, eleven billion, two hundred one million, one hundred eleven thousand, two hundred seventy-one".