212132221321 has 2 divisors, whose sum is σ = 212132221322. Its totient is φ = 212132221320.

The previous prime is 212132221237. The next prime is 212132221331. The reversal of 212132221321 is 123122231212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 121148548096 + 90983673225 = 348064^2 + 301635^2 .

It is a cyclic number.

It is not a de Polignac number, because 212132221321 - 2²⁹ = 211595350409 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 212132221292 and 212132221301.

It is not a weakly prime, because it can be changed into another prime (212132221331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106066110660 + 106066110661.

It is an arithmetic number, because the mean of its divisors is an integer number (106066110661).

Almost surely, 2^212132221321 is an apocalyptic number.

It is an amenable number.

212132221321 is a deficient number, since it is larger than the sum of its proper divisors (1).

212132221321 is an equidigital number, since it uses as much as digits as its factorization.

212132221321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 576, while the sum is 22.

Adding to 212132221321 its reverse (123122231212), we get a palindrome (335254452533).

The spelling of 212132221321 in words is "two hundred twelve billion, one hundred thirty-two million, two hundred twenty-one thousand, three hundred twenty-one".