10212360205981 has 2 divisors, whose sum is σ = 10212360205982. Its totient is φ = 10212360205980.

The previous prime is 10212360205973. The next prime is 10212360206093. The reversal of 10212360205981 is 18950206321201.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6033876396025 + 4178483809956 = 2456395^2 + 2044134^2 .

It is a cyclic number.

It is not a de Polignac number, because 10212360205981 - 2³ = 10212360205973 is a prime.

It is a super-2 number, since 2×10212360205981² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10212360205681) 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, 5106180102990 + 5106180102991.

It is an arithmetic number, because the mean of its divisors is an integer number (5106180102991).

Almost surely, 2^{10212360205981} is an apocalyptic number.

It is an amenable number.

10212360205981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10212360205981 is an equidigital number, since it uses as much as digits as its factorization.

10212360205981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The spelling of 10212360205981 in words is "ten trillion, two hundred twelve billion, three hundred sixty million, two hundred five thousand, nine hundred eighty-one".