1220210120266 has 32 divisors (see below), whose sum is σ = 1943952721920. Its totient is φ = 572447732736.

The previous prime is 1220210120159. The next prime is 1220210120267. The reversal of 1220210120266 is 6620210120221.

It is a self number, because there is not a number n which added to its sum of digits gives 1220210120266.

It is not an unprimeable number, because it can be changed into a prime (1220210120267) 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 in 15 ways as a sum of consecutive naturals, for example, 102506871 + ... + 102518773.

It is an arithmetic number, because the mean of its divisors is an integer number (60748522560).

Almost surely, 2^{1220210120266} is an apocalyptic number.

1220210120266 is a deficient number, since it is larger than the sum of its proper divisors (723742601654).

1220210120266 is a wasteful number, since it uses less digits than its factorization.

1220210120266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20958.

The product of its (nonzero) digits is 1152, while the sum is 25.

Adding to 1220210120266 its reverse (6620210120221), we get a palindrome (7840420240487).

The spelling of 1220210120266 in words is "one trillion, two hundred twenty billion, two hundred ten million, one hundred twenty thousand, two hundred sixty-six".