1321322101031 has 2 divisors, whose sum is σ = 1321322101032. Its totient is φ = 1321322101030.

The previous prime is 1321322101019. The next prime is 1321322101049. The reversal of 1321322101031 is 1301012231231.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1321322101031 is a prime.

It is a super-2 number, since 2×1321322101031² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1321322100994 and 1321322101012.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321322107031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 660661050515 + 660661050516.

It is an arithmetic number, because the mean of its divisors is an integer number (660661050516).

Almost surely, 2^{1321322101031} is an apocalyptic number.

1321322101031 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321322101031 is an equidigital number, since it uses as much as digits as its factorization.

1321322101031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 20.

Adding to 1321322101031 its reverse (1301012231231), we get a palindrome (2622334332262).

The spelling of 1321322101031 in words is "one trillion, three hundred twenty-one billion, three hundred twenty-two million, one hundred one thousand, thirty-one".