1131221031103 has 4 divisors (see below), whose sum is σ = 1131226609720. Its totient is φ = 1131215452488.

The previous prime is 1131221031089. The next prime is 1131221031197. The reversal of 1131221031103 is 3011301221311.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1131221031103 is a prime.

It is a super-2 number, since 2×1131221031103² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1131221031803) 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 3 ways as a sum of consecutive naturals, for example, 2473200 + ... + 2894677.

It is an arithmetic number, because the mean of its divisors is an integer number (282806652430).

Almost surely, 2^{1131221031103} is an apocalyptic number.

1131221031103 is a deficient number, since it is larger than the sum of its proper divisors (5578617).

1131221031103 is an equidigital number, since it uses as much as digits as its factorization.

1131221031103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5578616.

The product of its (nonzero) digits is 108, while the sum is 19.

Adding to 1131221031103 its reverse (3011301221311), we get a palindrome (4142522252414).

The spelling of 1131221031103 in words is "one trillion, one hundred thirty-one billion, two hundred twenty-one million, thirty-one thousand, one hundred three".