212222131423 has 4 divisors (see below), whose sum is σ = 212270269680. Its totient is φ = 212173993168.

The previous prime is 212222131411. The next prime is 212222131487. The reversal of 212222131423 is 324131222212.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212222131423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212222137423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 24062515 + ... + 24071332.

It is an arithmetic number, because the mean of its divisors is an integer number (53067567420).

Almost surely, 2^212222131423 is an apocalyptic number.

212222131423 is a deficient number, since it is larger than the sum of its proper divisors (48138257).

212222131423 is an equidigital number, since it uses as much as digits as its factorization.

212222131423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 48138256.

The product of its digits is 2304, while the sum is 25.

Adding to 212222131423 its reverse (324131222212), we get a palindrome (536353353635).

The spelling of 212222131423 in words is "two hundred twelve billion, two hundred twenty-two million, one hundred thirty-one thousand, four hundred twenty-three".