212221321253 has 2 divisors, whose sum is σ = 212221321254. Its totient is φ = 212221321252.

The previous prime is 212221321223. The next prime is 212221321259. The reversal of 212221321253 is 352123122212.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 192473483524 + 19747837729 = 438718^2 + 140527^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221321253 - 2⁶ = 212221321189 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212221321259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110660626 + 106110660627.

It is an arithmetic number, because the mean of its divisors is an integer number (106110660627).

Almost surely, 2^212221321253 is an apocalyptic number.

It is an amenable number.

212221321253 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221321253 is an equidigital number, since it uses as much as digits as its factorization.

212221321253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2880, while the sum is 26.

Adding to 212221321253 its reverse (352123122212), we get a palindrome (564344443465).

The spelling of 212221321253 in words is "two hundred twelve billion, two hundred twenty-one million, three hundred twenty-one thousand, two hundred fifty-three".