20011122221211 has 48 divisors (see below), whose sum is σ = 32283198604800. Its totient is φ = 11839591632960.

The previous prime is 20011122221173. The next prime is 20011122221249. The reversal of 20011122221211 is 11212222111002.

20011122221211 is a `hidden beast` number, since 200 + 1 + 11 + 22 + 221 + 211 = 666.

It is an interprime number because it is at equal distance from previous prime (20011122221173) and next prime (20011122221249).

It is not a de Polignac number, because 20011122221211 - 2²⁷ = 20010988003483 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20011122221261) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 6738190 + ... + 9242588.

It is an arithmetic number, because the mean of its divisors is an integer number (672566637600).

Almost surely, 2^{20011122221211} is an apocalyptic number.

20011122221211 is a deficient number, since it is larger than the sum of its proper divisors (12272076383589).

20011122221211 is a wasteful number, since it uses less digits than its factorization.

20011122221211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2506336 (or 2506333 counting only the distinct ones).

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

Adding to 20011122221211 its reverse (11212222111002), we get a palindrome (31223344332213).

The spelling of 20011122221211 in words is "twenty trillion, eleven billion, one hundred twenty-two million, two hundred twenty-one thousand, two hundred eleven".