20012211212211 has 24 divisors (see below), whose sum is σ = 29709408047280. Its totient is φ = 12971439061056.

The previous prime is 20012211212159. The next prime is 20012211212221. The reversal of 20012211212211 is 11221211221002.

20012211212211 is a `hidden beast` number, since 20 + 0 + 1 + 221 + 1 + 212 + 211 = 666.

It is not a de Polignac number, because 20012211212211 - 2²⁹ = 20011674341299 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20012211212221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21427981 + ... + 22342398.

It is an arithmetic number, because the mean of its divisors is an integer number (1237892001970).

Almost surely, 2^{20012211212211} is an apocalyptic number.

20012211212211 is a deficient number, since it is larger than the sum of its proper divisors (9697196835069).

20012211212211 is a wasteful number, since it uses less digits than its factorization.

20012211212211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43771795 (or 43771792 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 20012211212211 its reverse (11221211221002), we get a palindrome (31233422433213).

The spelling of 20012211212211 in words is "twenty trillion, twelve billion, two hundred eleven million, two hundred twelve thousand, two hundred eleven".