2211303322981 has 2 divisors, whose sum is σ = 2211303322982. Its totient is φ = 2211303322980.

The previous prime is 2211303322979. The next prime is 2211303323023. The reversal of 2211303322981 is 1892233031122.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1629682028100 + 581621294881 = 1276590^2 + 762641^2 .

It is a cyclic number.

It is not a de Polignac number, because 2211303322981 - 2¹ = 2211303322979 is a prime.

It is a super-2 number, since 2×2211303322981² (a number of 25 digits) contains 22 as substring.

Together with 2211303322979, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 2211303322981.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2211303322931) 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, 1105651661490 + 1105651661491.

It is an arithmetic number, because the mean of its divisors is an integer number (1105651661491).

Almost surely, 2^{2211303322981} is an apocalyptic number.

It is an amenable number.

2211303322981 is a deficient number, since it is larger than the sum of its proper divisors (1).

2211303322981 is an equidigital number, since it uses as much as digits as its factorization.

2211303322981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 37.

The spelling of 2211303322981 in words is "two trillion, two hundred eleven billion, three hundred three million, three hundred twenty-two thousand, nine hundred eighty-one".