212342004043421 has 4 divisors (see below), whose sum is σ = 242676576049632. Its totient is φ = 182007432037212.

The previous prime is 212342004043399. The next prime is 212342004043423. The reversal of 212342004043421 is 124340400243212.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 212342004043421 - 2²² = 212341999849117 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 (212342004043423) 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, 15167286003095 + ... + 15167286003108.

It is an arithmetic number, because the mean of its divisors is an integer number (60669144012408).

Almost surely, 2^{212342004043421} is an apocalyptic number.

It is an amenable number.

212342004043421 is a deficient number, since it is larger than the sum of its proper divisors (30334572006211).

212342004043421 is an equidigital number, since it uses as much as digits as its factorization.

212342004043421 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30334572006210.

The product of its (nonzero) digits is 36864, while the sum is 32.

Adding to 212342004043421 its reverse (124340400243212), we get a palindrome (336682404286633).

The spelling of 212342004043421 in words is "two hundred twelve trillion, three hundred forty-two billion, four million, forty-three thousand, four hundred twenty-one".