2213206303981 has 2 divisors, whose sum is σ = 2213206303982. Its totient is φ = 2213206303980.

The previous prime is 2213206303933. The next prime is 2213206303991. The reversal of 2213206303981 is 1893036023122.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1556919990756 + 656286313225 = 1247766^2 + 810115^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2213206303981 is a prime.

It is a super-2 number, since 2×2213206303981² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2213206303901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1106603151990 + 1106603151991.

It is an arithmetic number, because the mean of its divisors is an integer number (1106603151991).

Almost surely, 2^{2213206303981} is an apocalyptic number.

It is an amenable number.

2213206303981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2213206303981 is an equidigital number, since it uses as much as digits as its factorization.

2213206303981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 93312, while the sum is 40.

The spelling of 2213206303981 in words is "two trillion, two hundred thirteen billion, two hundred six million, three hundred three thousand, nine hundred eighty-one".