1028307021331 has 2 divisors, whose sum is σ = 1028307021332. Its totient is φ = 1028307021330.

The previous prime is 1028307021323. The next prime is 1028307021341. The reversal of 1028307021331 is 1331207038201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1028307021331 - 2³ = 1028307021323 is a prime.

It is a super-2 number, since 2×1028307021331² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1028307021293 and 1028307021302.

It is not a weakly prime, because it can be changed into another prime (1028307021341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 514153510665 + 514153510666.

It is an arithmetic number, because the mean of its divisors is an integer number (514153510666).

Almost surely, 2^{1028307021331} is an apocalyptic number.

1028307021331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1028307021331 is an equidigital number, since it uses as much as digits as its factorization.

1028307021331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 31.

The spelling of 1028307021331 in words is "one trillion, twenty-eight billion, three hundred seven million, twenty-one thousand, three hundred thirty-one".