212210420423 has 4 divisors (see below), whose sum is σ = 219055917888. Its totient is φ = 205364922960.

The previous prime is 212210420413. The next prime is 212210420447. The reversal of 212210420423 is 324024012212.

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 212210420423 - 2⁴ = 212210420407 is a prime.

It is a super-2 number, since 2×212210420423² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212210420413) 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, 3422748686 + ... + 3422748747.

It is an arithmetic number, because the mean of its divisors is an integer number (54763979472).

Almost surely, 2^212210420423 is an apocalyptic number.

212210420423 is a deficient number, since it is larger than the sum of its proper divisors (6845497465).

212210420423 is an equidigital number, since it uses as much as digits as its factorization.

212210420423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6845497464.

The product of its (nonzero) digits is 1536, while the sum is 23.

Adding to 212210420423 its reverse (324024012212), we get a palindrome (536234432635).

The spelling of 212210420423 in words is "two hundred twelve billion, two hundred ten million, four hundred twenty thousand, four hundred twenty-three".