1311301003021 has 2 divisors, whose sum is σ = 1311301003022. Its totient is φ = 1311301003020.

The previous prime is 1311301002983. The next prime is 1311301003037. The reversal of 1311301003021 is 1203001031131.

It is an a-pointer prime, because the next prime (1311301003037) can be obtained adding 1311301003021 to its sum of digits (16).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 664143502500 + 647157500521 = 814950^2 + 804461^2 .

It is a cyclic number.

It is not a de Polignac number, because 1311301003021 - 2¹⁵ = 1311300970253 is a prime.

It is a super-2 number, since 2×1311301003021² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1311301002986 and 1311301003004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311301003721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655650501510 + 655650501511.

It is an arithmetic number, because the mean of its divisors is an integer number (655650501511).

Almost surely, 2^{1311301003021} is an apocalyptic number.

It is an amenable number.

1311301003021 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311301003021 is an equidigital number, since it uses as much as digits as its factorization.

1311301003021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54, while the sum is 16.

Adding to 1311301003021 its reverse (1203001031131), we get a palindrome (2514302034152).

The spelling of 1311301003021 in words is "one trillion, three hundred eleven billion, three hundred one million, three thousand, twenty-one".