212202011001221 has 2 divisors, whose sum is σ = 212202011001222. Its totient is φ = 212202011001220.

The previous prime is 212202011001131. The next prime is 212202011001259. The reversal of 212202011001221 is 122100110202212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 205893399228196 + 6308611773025 = 14348986^2 + 2511695^2 .

It is a cyclic number.

It is not a de Polignac number, because 212202011001221 - 2¹⁰ = 212202011000197 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 212202011001221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212202011001121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106101005500610 + 106101005500611.

It is an arithmetic number, because the mean of its divisors is an integer number (106101005500611).

Almost surely, 2^{212202011001221} is an apocalyptic number.

It is an amenable number.

212202011001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

212202011001221 is an equidigital number, since it uses as much as digits as its factorization.

212202011001221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64, while the sum is 17.

Adding to 212202011001221 its reverse (122100110202212), we get a palindrome (334302121203433).

The spelling of 212202011001221 in words is "two hundred twelve trillion, two hundred two billion, eleven million, one thousand, two hundred twenty-one".