20213212223 has 4 divisors (see below), whose sum is σ = 20218389720. Its totient is φ = 20208034728.

The previous prime is 20213212189. The next prime is 20213212249. The reversal of 20213212223 is 32221231202.

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 20213212223 - 2¹⁴ = 20213195839 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 20213212195 and 20213212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20213212273) 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, 2582888 + ... + 2590701.

It is an arithmetic number, because the mean of its divisors is an integer number (5054597430).

Almost surely, 2^20213212223 is an apocalyptic number.

20213212223 is a deficient number, since it is larger than the sum of its proper divisors (5177497).

20213212223 is an equidigital number, since it uses as much as digits as its factorization.

20213212223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5177496.

The product of its (nonzero) digits is 576, while the sum is 20.

Adding to 20213212223 its reverse (32221231202), we get a palindrome (52434443425).

The spelling of 20213212223 in words is "twenty billion, two hundred thirteen million, two hundred twelve thousand, two hundred twenty-three".