1031120221013 has 2 divisors, whose sum is σ = 1031120221014. Its totient is φ = 1031120221012.

The previous prime is 1031120220983. The next prime is 1031120221031. The reversal of 1031120221013 is 3101220211301.

Together with next prime (1031120221031) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 777081036484 + 254039184529 = 881522^2 + 504023^2 .

It is a cyclic number.

It is not a de Polignac number, because 1031120221013 - 2²² = 1031116026709 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1031120220982 and 1031120221000.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1031120221513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 515560110506 + 515560110507.

It is an arithmetic number, because the mean of its divisors is an integer number (515560110507).

Almost surely, 2^{1031120221013} is an apocalyptic number.

It is an amenable number.

1031120221013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1031120221013 is an equidigital number, since it uses as much as digits as its factorization.

1031120221013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 17.

Adding to 1031120221013 its reverse (3101220211301), we get a palindrome (4132340432314).

The spelling of 1031120221013 in words is "one trillion, thirty-one billion, one hundred twenty million, two hundred twenty-one thousand, thirteen".