10212167681 has 2 divisors, whose sum is σ = 10212167682. Its totient is φ = 10212167680.

The previous prime is 10212167659. The next prime is 10212167711. The reversal of 10212167681 is 18676121201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9137639281 + 1074528400 = 95591^2 + 32780^2 .

It is an emirp because it is prime and its reverse (18676121201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 10212167681 - 2⁶ = 10212167617 is a prime.

It is a super-2 number, since 2×10212167681² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10212167621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5106083840 + 5106083841.

It is an arithmetic number, because the mean of its divisors is an integer number (5106083841).

Almost surely, 2^10212167681 is an apocalyptic number.

It is an amenable number.

10212167681 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212167681 is an equidigital number, since it uses as much as digits as its factorization.

10212167681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 35.

Adding to 10212167681 its reverse (18676121201), we get a palindrome (28888288882).

The spelling of 10212167681 in words is "ten billion, two hundred twelve million, one hundred sixty-seven thousand, six hundred eighty-one".