1220021220281 has 2 divisors, whose sum is σ = 1220021220282. Its totient is φ = 1220021220280.

The previous prime is 1220021220191. The next prime is 1220021220343. The reversal of 1220021220281 is 1820221200221.

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., 1176174954256 + 43846266025 = 1084516^2 + 209395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1220021220281 - 2¹⁰ = 1220021219257 is a prime.

It is a super-2 number, since 2×1220021220281² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1220021220881) 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, 610010610140 + 610010610141.

It is an arithmetic number, because the mean of its divisors is an integer number (610010610141).

Almost surely, 2^{1220021220281} is an apocalyptic number.

It is an amenable number.

1220021220281 is a deficient number, since it is larger than the sum of its proper divisors (1).

1220021220281 is an equidigital number, since it uses as much as digits as its factorization.

1220021220281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 512, while the sum is 23.

The spelling of 1220021220281 in words is "one trillion, two hundred twenty billion, twenty-one million, two hundred twenty thousand, two hundred eighty-one".