1321101013 has 2 divisors, whose sum is σ = 1321101014. Its totient is φ = 1321101012.

The previous prime is 1321101007. The next prime is 1321101017. The reversal of 1321101013 is 3101011231.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1264655844 + 56445169 = 35562^2 + 7513^2 .

It is a cyclic number.

It is not a de Polignac number, because 1321101013 - 2⁵ = 1321100981 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1321100984 and 1321101002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1321101017) 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 as a sum of consecutive naturals, namely, 660550506 + 660550507.

It is an arithmetic number, because the mean of its divisors is an integer number (660550507).

Almost surely, 2^1321101013 is an apocalyptic number.

It is an amenable number.

1321101013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1321101013 is an equidigital number, since it uses as much as digits as its factorization.

1321101013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 1321101013 is about 36346.9532835972. The cubic root of 1321101013 is about 1097.2662178145.

Adding to 1321101013 its reverse (3101011231), we get a palindrome (4422112244).

The spelling of 1321101013 in words is "one billion, three hundred twenty-one million, one hundred one thousand, thirteen".