1031321323103 has 4 divisors (see below), whose sum is σ = 1085601392760. Its totient is φ = 977041253448.

The previous prime is 1031321323099. The next prime is 1031321323171. The reversal of 1031321323103 is 3013231231301.

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

It is a cyclic number.

It is not a de Polignac number, because 1031321323103 - 2² = 1031321323099 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 (1031321323183) 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, 27140034800 + ... + 27140034837.

It is an arithmetic number, because the mean of its divisors is an integer number (271400348190).

Almost surely, 2^{1031321323103} is an apocalyptic number.

1031321323103 is a deficient number, since it is larger than the sum of its proper divisors (54280069657).

1031321323103 is an equidigital number, since it uses as much as digits as its factorization.

1031321323103 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54280069656.

The product of its (nonzero) digits is 972, while the sum is 23.

Adding to 1031321323103 its reverse (3013231231301), we get a palindrome (4044552554404).

The spelling of 1031321323103 in words is "one trillion, thirty-one billion, three hundred twenty-one million, three hundred twenty-three thousand, one hundred three".