10212243446521 has 2 divisors, whose sum is σ = 10212243446522. Its totient is φ = 10212243446520.

The previous prime is 10212243446473. The next prime is 10212243446557. The reversal of 10212243446521 is 12564434221201.

10212243446521 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10005549554025 + 206693892496 = 3163155^2 + 454636^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212243446521 - 2¹³ = 10212243438329 is a prime.

It is a super-2 number, since 2×10212243446521² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10212243446221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106121723260 + 5106121723261.

It is an arithmetic number, because the mean of its divisors is an integer number (5106121723261).

Almost surely, 2^{10212243446521} is an apocalyptic number.

It is an amenable number.

10212243446521 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212243446521 is an equidigital number, since it uses as much as digits as its factorization.

10212243446521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 92160, while the sum is 37.

Adding to 10212243446521 its reverse (12564434221201), we get a palindrome (22776677667722).

The spelling of 10212243446521 in words is "ten trillion, two hundred twelve billion, two hundred forty-three million, four hundred forty-six thousand, five hundred twenty-one".