1073220545281 has 4 divisors (see below), whose sum is σ = 1073705509332. Its totient is φ = 1072735581232.

The previous prime is 1073220545279. The next prime is 1073220545323. The reversal of 1073220545281 is 1825450223701.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 854117914225 + 219102631056 = 924185^2 + 468084^2 .

It is a cyclic number.

It is not a de Polignac number, because 1073220545281 - 2¹ = 1073220545279 is a prime.

It is a super-2 number, since 2×1073220545281² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1073220545081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 242478706 + ... + 242483131.

It is an arithmetic number, because the mean of its divisors is an integer number (268426377333).

Almost surely, 2^{1073220545281} is an apocalyptic number.

It is an amenable number.

1073220545281 is a deficient number, since it is larger than the sum of its proper divisors (484964051).

1073220545281 is an equidigital number, since it uses as much as digits as its factorization.

1073220545281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484964050.

The product of its (nonzero) digits is 134400, while the sum is 40.

Adding to 1073220545281 its reverse (1825450223701), we get a palindrome (2898670768982).

The spelling of 1073220545281 in words is "one trillion, seventy-three billion, two hundred twenty million, five hundred forty-five thousand, two hundred eighty-one".