20001112221211 has 4 divisors (see below), whose sum is σ = 21819395150424. Its totient is φ = 18182829292000.

The previous prime is 20001112221193. The next prime is 20001112221227. The reversal of 20001112221211 is 11212221110002.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 20001112221211 - 2¹⁷ = 20001112090139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20001112221241) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 909141464590 + ... + 909141464611.

It is an arithmetic number, because the mean of its divisors is an integer number (5454848787606).

Almost surely, 2^{20001112221211} is an apocalyptic number.

20001112221211 is a deficient number, since it is larger than the sum of its proper divisors (1818282929213).

20001112221211 is a wasteful number, since it uses less digits than its factorization.

20001112221211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1818282929212.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 20001112221211 its reverse (11212221110002), we get a palindrome (31213333331213).

The spelling of 20001112221211 in words is "twenty trillion, one billion, one hundred twelve million, two hundred twenty-one thousand, two hundred eleven".