20211012223 has 4 divisors (see below), whose sum is σ = 20211855280. Its totient is φ = 20210169168.

The previous prime is 20211012191. The next prime is 20211012259. The reversal of 20211012223 is 32221011202.

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 20211012223 - 2⁵ = 20211012191 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20211012197 and 20211012206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20211012293) 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, 384483 + ... + 433876.

It is an arithmetic number, because the mean of its divisors is an integer number (5052963820).

Almost surely, 2^20211012223 is an apocalyptic number.

20211012223 is a deficient number, since it is larger than the sum of its proper divisors (843057).

20211012223 is an equidigital number, since it uses as much as digits as its factorization.

20211012223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 843056.

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

Adding to 20211012223 its reverse (32221011202), we get a palindrome (52432023425).

The spelling of 20211012223 in words is "twenty billion, two hundred eleven million, twelve thousand, two hundred twenty-three".