1210201112221 has 2 divisors, whose sum is σ = 1210201112222. Its totient is φ = 1210201112220.

The previous prime is 1210201112213. The next prime is 1210201112287. The reversal of 1210201112221 is 1222111020121.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 865385528121 + 344815584100 = 930261^2 + 587210^2 .

It is a cyclic number.

It is not a de Polignac number, because 1210201112221 - 2³ = 1210201112213 is a prime.

It is a super-3 number, since 3×1210201112221³ (a number of 37 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1210201112195 and 1210201112204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1210201112521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 605100556110 + 605100556111.

It is an arithmetic number, because the mean of its divisors is an integer number (605100556111).

Almost surely, 2^{1210201112221} is an apocalyptic number.

It is an amenable number.

1210201112221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1210201112221 is an equidigital number, since it uses as much as digits as its factorization.

1210201112221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 32, while the sum is 16.

Adding to 1210201112221 its reverse (1222111020121), we get a palindrome (2432312132342).

The spelling of 1210201112221 in words is "one trillion, two hundred ten billion, two hundred one million, one hundred twelve thousand, two hundred twenty-one".