212212221211321 has 12 divisors (see below), whose sum is σ = 217328954898468. Its totient is φ = 207213328665504.

The previous prime is 212212221211273. The next prime is 212212221211349. The reversal of 212212221211321 is 123112122212212.

It can be written as a sum of positive squares in 2 ways, for example, as 181060195251321 + 31152025960000 = 13455861^2 + 5581400^2 .

It is not a de Polignac number, because 212212221211321 - 2⁴⁵ = 177027849122489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (212212221211021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11626050 + ... + 23655643.

It is an arithmetic number, because the mean of its divisors is an integer number (18110746241539).

Almost surely, 2^{212212221211321} is an apocalyptic number.

It is an amenable number.

212212221211321 is a deficient number, since it is larger than the sum of its proper divisors (5116733687147).

212212221211321 is an equidigital number, since it uses as much as digits as its factorization.

212212221211321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35285032 (or 35284989 counting only the distinct ones).

The product of its digits is 768, while the sum is 25.

Adding to 212212221211321 its reverse (123112122212212), we get a palindrome (335324343423533).

The spelling of 212212221211321 in words is "two hundred twelve trillion, two hundred twelve billion, two hundred twenty-one million, two hundred eleven thousand, three hundred twenty-one".