10313223221981 has 2 divisors, whose sum is σ = 10313223221982. Its totient is φ = 10313223221980.

The previous prime is 10313223221957. The next prime is 10313223221989. The reversal of 10313223221981 is 18912232231301.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9959357664025 + 353865557956 = 3155845^2 + 594866^2 .

It is a cyclic number.

It is not a de Polignac number, because 10313223221981 - 2¹⁰ = 10313223220957 is a prime.

It is a super-3 number, since 3×10313223221981³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10313223221989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5156611610990 + 5156611610991.

It is an arithmetic number, because the mean of its divisors is an integer number (5156611610991).

Almost surely, 2^{10313223221981} is an apocalyptic number.

It is an amenable number.

10313223221981 is a deficient number, since it is larger than the sum of its proper divisors (1).

10313223221981 is an equidigital number, since it uses as much as digits as its factorization.

10313223221981 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The spelling of 10313223221981 in words is "ten trillion, three hundred thirteen billion, two hundred twenty-three million, two hundred twenty-one thousand, nine hundred eighty-one".