212986913276981 has 2 divisors, whose sum is σ = 212986913276982. Its totient is φ = 212986913276980.

The previous prime is 212986913276923. The next prime is 212986913276989. The reversal of 212986913276981 is 189672319689212.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210779118478756 + 2207794798225 = 14518234^2 + 1485865^2 .

It is a cyclic number.

It is not a de Polignac number, because 212986913276981 - 2³⁴ = 212969733407797 is a prime.

It is a super-2 number, since 2×212986913276981² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 212986913276899 and 212986913276908.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (212986913276989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 106493456638490 + 106493456638491.

It is an arithmetic number, because the mean of its divisors is an integer number (106493456638491).

Almost surely, 2^{212986913276981} is an apocalyptic number.

It is an amenable number.

212986913276981 is a deficient number, since it is larger than the sum of its proper divisors (1).

212986913276981 is an equidigital number, since it uses as much as digits as its factorization.

212986913276981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282175488, while the sum is 74.

The spelling of 212986913276981 in words is "two hundred twelve trillion, nine hundred eighty-six billion, nine hundred thirteen million, two hundred seventy-six thousand, nine hundred eighty-one".