212202554321 has 2 divisors, whose sum is σ = 212202554322. Its totient is φ = 212202554320.

The previous prime is 212202554293. The next prime is 212202554381. The reversal of 212202554321 is 123455202212.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 154499308096 + 57703246225 = 393064^2 + 240215^2 .

It is a cyclic number.

It is not a de Polignac number, because 212202554321 - 2¹⁸ = 212202292177 is a prime.

It is not a weakly prime, because it can be changed into another prime (212202554381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106101277160 + 106101277161.

It is an arithmetic number, because the mean of its divisors is an integer number (106101277161).

Almost surely, 2^212202554321 is an apocalyptic number.

It is an amenable number.

212202554321 is a deficient number, since it is larger than the sum of its proper divisors (1).

212202554321 is an equidigital number, since it uses as much as digits as its factorization.

212202554321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9600, while the sum is 29.

Adding to 212202554321 its reverse (123455202212), we get a palindrome (335657756533).

The spelling of 212202554321 in words is "two hundred twelve billion, two hundred two million, five hundred fifty-four thousand, three hundred twenty-one".