10210100211221 has 2 divisors, whose sum is σ = 10210100211222. Its totient is φ = 10210100211220.

The previous prime is 10210100211161. The next prime is 10210100211257. The reversal of 10210100211221 is 12211200101201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10054162888900 + 155937322321 = 3170830^2 + 394889^2 .

It is a cyclic number.

It is not a de Polignac number, because 10210100211221 - 2¹⁴ = 10210100194837 is a prime.

It is a super-2 number, since 2×10210100211221² (a number of 27 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 10210100211196 and 10210100211205.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10210100211121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105050105610 + 5105050105611.

It is an arithmetic number, because the mean of its divisors is an integer number (5105050105611).

Almost surely, 2^{10210100211221} is an apocalyptic number.

It is an amenable number.

10210100211221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10210100211221 is an equidigital number, since it uses as much as digits as its factorization.

10210100211221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 16, while the sum is 14.

Adding to 10210100211221 its reverse (12211200101201), we get a palindrome (22421300312422).

The spelling of 10210100211221 in words is "ten trillion, two hundred ten billion, one hundred million, two hundred eleven thousand, two hundred twenty-one".