212223402212321 has 8 divisors (see below), whose sum is σ = 220242860959080. Its totient is φ = 204250704158592.

The previous prime is 212223402212281. The next prime is 212223402212329. The reversal of 212223402212321 is 123212204322212.

It can be written as a sum of positive squares in 4 ways, for example, as 722226325921 + 211501175886400 = 849839^2 + 14543080^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-212223402212321 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212223402212329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11690164010 + ... + 11690182163.

It is an arithmetic number, because the mean of its divisors is an integer number (27530357619885).

Almost surely, 2^{212223402212321} is an apocalyptic number.

It is an amenable number.

212223402212321 is a deficient number, since it is larger than the sum of its proper divisors (8019458746759).

212223402212321 is a wasteful number, since it uses less digits than its factorization.

212223402212321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23380346515.

The product of its (nonzero) digits is 9216, while the sum is 29.

Adding to 212223402212321 its reverse (123212204322212), we get a palindrome (335435606534533).

The spelling of 212223402212321 in words is "two hundred twelve trillion, two hundred twenty-three billion, four hundred two million, two hundred twelve thousand, three hundred twenty-one".