1022221211985 has 12 divisors (see below), whose sum is σ = 1771850100852. Its totient is φ = 545184646368.

The previous prime is 1022221211953. The next prime is 1022221212083. The reversal of 1022221211985 is 5891121222201.

It can be written as a sum of positive squares in 2 ways, for example, as 322977392721 + 699243819264 = 568311^2 + 836208^2 .

It is not a de Polignac number, because 1022221211985 - 2⁵ = 1022221211953 is a prime.

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 11358013422 + ... + 11358013511.

It is an arithmetic number, because the mean of its divisors is an integer number (147654175071).

Almost surely, 2^{1022221211985} is an apocalyptic number.

1022221211985 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1022221211985 is a deficient number, since it is larger than the sum of its proper divisors (749628888867).

1022221211985 is a wasteful number, since it uses less digits than its factorization.

1022221211985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22716026944 (or 22716026941 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The spelling of 1022221211985 in words is "one trillion, twenty-two billion, two hundred twenty-one million, two hundred eleven thousand, nine hundred eighty-five".