20112221211 has 8 divisors (see below), whose sum is σ = 26818409280. Its totient is φ = 13407090312.

The previous prime is 20112221141. The next prime is 20112221231. The reversal of 20112221211 is 11212221102.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 20112221211 - 2¹⁰ = 20112220187 is a prime.

It is not an unprimeable number, because it can be changed into a prime (20112221231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 218781 + ... + 296798.

It is an arithmetic number, because the mean of its divisors is an integer number (3352301160).

Almost surely, 2^20112221211 is an apocalyptic number.

20112221211 is a deficient number, since it is larger than the sum of its proper divisors (6706188069).

20112221211 is a wasteful number, since it uses less digits than its factorization.

20112221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528585.

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 20112221211 its reverse (11212221102), we get a palindrome (31324442313).

It can be divided in two parts, 2011 and 2221211, that added together give a palindrome (2223222).

The spelling of 20112221211 in words is "twenty billion, one hundred twelve million, two hundred twenty-one thousand, two hundred eleven".