252841211221 has 2 divisors, whose sum is σ = 252841211222. Its totient is φ = 252841211220.

The previous prime is 252841211201. The next prime is 252841211279. The reversal of 252841211221 is 122112148252.

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., 174357188721 + 78484022500 = 417561^2 + 280150^2 .

It is a cyclic number.

It is not a de Polignac number, because 252841211221 - 2¹³ = 252841203029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252841211201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126420605610 + 126420605611.

It is an arithmetic number, because the mean of its divisors is an integer number (126420605611).

Almost surely, 2^252841211221 is an apocalyptic number.

It is an amenable number.

252841211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

252841211221 is an equidigital number, since it uses as much as digits as its factorization.

252841211221 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5120, while the sum is 31.

Adding to 252841211221 its reverse (122112148252), we get a palindrome (374953359473).

The spelling of 252841211221 in words is "two hundred fifty-two billion, eight hundred forty-one million, two hundred eleven thousand, two hundred twenty-one".