1023431211331 has 2 divisors, whose sum is σ = 1023431211332. Its totient is φ = 1023431211330.

The previous prime is 1023431211329. The next prime is 1023431211349. The reversal of 1023431211331 is 1331121343201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1023431211331 - 2¹ = 1023431211329 is a prime.

It is a super-2 number, since 2×1023431211331² (a number of 25 digits) contains 22 as substring.

Together with 1023431211329, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 1023431211296 and 1023431211305.

It is not a weakly prime, because it can be changed into another prime (1023431211431) 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, 511715605665 + 511715605666.

It is an arithmetic number, because the mean of its divisors is an integer number (511715605666).

Almost surely, 2^{1023431211331} is an apocalyptic number.

1023431211331 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023431211331 is an equidigital number, since it uses as much as digits as its factorization.

1023431211331 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 1023431211331 its reverse (1331121343201), we get a palindrome (2354552554532).

The spelling of 1023431211331 in words is "one trillion, twenty-three billion, four hundred thirty-one million, two hundred eleven thousand, three hundred thirty-one".