1031203322221 has 16 divisors (see below), whose sum is σ = 1096508320560. Its totient is φ = 968213908480.

The previous prime is 1031203322203. The next prime is 1031203322267. The reversal of 1031203322221 is 1222233021301.

It can be written as a sum of positive squares in 8 ways, for example, as 262318108900 + 768885213321 = 512170^2 + 876861^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031203322221 - 2¹⁷ = 1031203191149 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1031203322192 and 1031203322201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031203382221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2794990 + ... + 3142351.

It is an arithmetic number, because the mean of its divisors is an integer number (68531770035).

Almost surely, 2^{1031203322221} is an apocalyptic number.

It is an amenable number.

1031203322221 is a deficient number, since it is larger than the sum of its proper divisors (65304998339).

1031203322221 is a wasteful number, since it uses less digits than its factorization.

1031203322221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5937536.

The product of its (nonzero) digits is 864, while the sum is 22.

Adding to 1031203322221 its reverse (1222233021301), we get a palindrome (2253436343522).

The spelling of 1031203322221 in words is "one trillion, thirty-one billion, two hundred three million, three hundred twenty-two thousand, two hundred twenty-one".