20012223211 has 4 divisors (see below), whose sum is σ = 20069895672. Its totient is φ = 19954550752.

The previous prime is 20012223193. The next prime is 20012223221. The reversal of 20012223211 is 11232221002.

It is a happy number.

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 20012223211 - 2⁷ = 20012223083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (20012223221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28835710 + ... + 28836403.

It is an arithmetic number, because the mean of its divisors is an integer number (5017473918).

Almost surely, 2^20012223211 is an apocalyptic number.

20012223211 is a deficient number, since it is larger than the sum of its proper divisors (57672461).

20012223211 is an equidigital number, since it uses as much as digits as its factorization.

20012223211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57672460.

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 20012223211 its reverse (11232221002), we get a palindrome (31244444213).

The spelling of 20012223211 in words is "twenty billion, twelve million, two hundred twenty-three thousand, two hundred eleven".