10210025001221 has 2 divisors, whose sum is σ = 10210025001222. Its totient is φ = 10210025001220.

The previous prime is 10210025001217. The next prime is 10210025001229. The reversal of 10210025001221 is 12210052001201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6469239640900 + 3740785360321 = 2543470^2 + 1934111^2 .

It is a cyclic number.

It is not a de Polignac number, because 10210025001221 - 2² = 10210025001217 is a prime.

It is a super-2 number, since 2×10210025001221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 10210025001221.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10210025001229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5105012500610 + 5105012500611.

It is an arithmetic number, because the mean of its divisors is an integer number (5105012500611).

Almost surely, 2^{10210025001221} is an apocalyptic number.

It is an amenable number.

10210025001221 is a deficient number, since it is larger than the sum of its proper divisors (1).

10210025001221 is an equidigital number, since it uses as much as digits as its factorization.

10210025001221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 80, while the sum is 17.

Adding to 10210025001221 its reverse (12210052001201), we get a palindrome (22420077002422).

The spelling of 10210025001221 in words is "ten trillion, two hundred ten billion, twenty-five million, one thousand, two hundred twenty-one".