1031131021103 has 4 divisors (see below), whose sum is σ = 1066687263240. Its totient is φ = 995574778968.

The previous prime is 1031131021087. The next prime is 1031131021163. The reversal of 1031131021103 is 3011201311301.

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

It is not a de Polignac number, because 1031131021103 - 2⁴ = 1031131021087 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1031131021163) 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, 17778121025 + ... + 17778121082.

It is an arithmetic number, because the mean of its divisors is an integer number (266671815810).

Almost surely, 2^{1031131021103} is an apocalyptic number.

1031131021103 is a deficient number, since it is larger than the sum of its proper divisors (35556242137).

1031131021103 is an equidigital number, since it uses as much as digits as its factorization.

1031131021103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35556242136.

The product of its (nonzero) digits is 54, while the sum is 17.

Adding to 1031131021103 its reverse (3011201311301), we get a palindrome (4042332332404).

The spelling of 1031131021103 in words is "one trillion, thirty-one billion, one hundred thirty-one million, twenty-one thousand, one hundred three".