1031321131211 has 4 divisors (see below), whose sum is σ = 1178652721392. Its totient is φ = 883989541032.

The previous prime is 1031321131199. The next prime is 1031321131229. The reversal of 1031321131211 is 1121311231301.

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-1031321131211 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1031321133211) 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, 73665795080 + ... + 73665795093.

It is an arithmetic number, because the mean of its divisors is an integer number (294663180348).

Almost surely, 2^{1031321131211} is an apocalyptic number.

1031321131211 is a deficient number, since it is larger than the sum of its proper divisors (147331590181).

1031321131211 is an equidigital number, since it uses as much as digits as its factorization.

1031321131211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147331590180.

The product of its (nonzero) digits is 108, while the sum is 20.

Adding to 1031321131211 its reverse (1121311231301), we get a palindrome (2152632362512).

The spelling of 1031321131211 in words is "one trillion, thirty-one billion, three hundred twenty-one million, one hundred thirty-one thousand, two hundred eleven".