20011212271 has 2 divisors, whose sum is σ = 20011212272. Its totient is φ = 20011212270.

The previous prime is 20011212241. The next prime is 20011212283. The reversal of 20011212271 is 17221211002.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 20011212271 - 2¹¹ = 20011210223 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (20011212241) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10005606135 + 10005606136.

It is an arithmetic number, because the mean of its divisors is an integer number (10005606136).

Almost surely, 2^20011212271 is an apocalyptic number.

20011212271 is a deficient number, since it is larger than the sum of its proper divisors (1).

20011212271 is an equidigital number, since it uses as much as digits as its factorization.

20011212271 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112, while the sum is 19.

Adding to 20011212271 its reverse (17221211002), we get a palindrome (37232423273).

The spelling of 20011212271 in words is "twenty billion, eleven million, two hundred twelve thousand, two hundred seventy-one".