212221102601 has 2 divisors, whose sum is σ = 212221102602. Its totient is φ = 212221102600.

The previous prime is 212221102571. The next prime is 212221102669. The reversal of 212221102601 is 106201122212.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 123991311376 + 88229791225 = 352124^2 + 297035^2 .

It is a cyclic number.

It is not a de Polignac number, because 212221102601 - 2¹⁰ = 212221101577 is a prime.

It is not a weakly prime, because it can be changed into another prime (212281102601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106110551300 + 106110551301.

It is an arithmetic number, because the mean of its divisors is an integer number (106110551301).

Almost surely, 2^212221102601 is an apocalyptic number.

It is an amenable number.

212221102601 is a deficient number, since it is larger than the sum of its proper divisors (1).

212221102601 is an equidigital number, since it uses as much as digits as its factorization.

212221102601 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 192, while the sum is 20.

Adding to 212221102601 its reverse (106201122212), we get a palindrome (318422224813).

The spelling of 212221102601 in words is "two hundred twelve billion, two hundred twenty-one million, one hundred two thousand, six hundred one".