212144331004321 has 4 divisors (see below), whose sum is σ = 212689689182100. Its totient is φ = 211598972826544.

The previous prime is 212144331004303. The next prime is 212144331004357. The reversal of 212144331004321 is 123400133441212.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 114878975221921 + 97265355782400 = 10718161^2 + 9862320^2 .

It is a cyclic number.

It is not a de Polignac number, because 212144331004321 - 2²¹ = 212144328907169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212144331004621) 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, 272679088306 + ... + 272679089083.

It is an arithmetic number, because the mean of its divisors is an integer number (53172422295525).

Almost surely, 2^{212144331004321} is an apocalyptic number.

It is an amenable number.

212144331004321 is a deficient number, since it is larger than the sum of its proper divisors (545358177779).

212144331004321 is an equidigital number, since it uses as much as digits as its factorization.

212144331004321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545358177778.

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 212144331004321 its reverse (123400133441212), we get a palindrome (335544464445533).

The spelling of 212144331004321 in words is "two hundred twelve trillion, one hundred forty-four billion, three hundred thirty-one million, four thousand, three hundred twenty-one".