1313021102221 has 2 divisors, whose sum is σ = 1313021102222. Its totient is φ = 1313021102220.

The previous prime is 1313021102203. The next prime is 1313021102273. The reversal of 1313021102221 is 1222011203131.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1297637661321 + 15383440900 = 1139139^2 + 124030^2 .

It is a cyclic number.

It is not a de Polignac number, because 1313021102221 - 2¹³ = 1313021094029 is a prime.

It is a super-2 number, since 2×1313021102221² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1313021102201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 656510551110 + 656510551111.

It is an arithmetic number, because the mean of its divisors is an integer number (656510551111).

Almost surely, 2^{1313021102221} is an apocalyptic number.

It is an amenable number.

1313021102221 is a deficient number, since it is larger than the sum of its proper divisors (1).

1313021102221 is an equidigital number, since it uses as much as digits as its factorization.

1313021102221 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

Adding to 1313021102221 its reverse (1222011203131), we get a palindrome (2535032305352).

The spelling of 1313021102221 in words is "one trillion, three hundred thirteen billion, twenty-one million, one hundred two thousand, two hundred twenty-one".