1021131131243 has 2 divisors, whose sum is σ = 1021131131244. Its totient is φ = 1021131131242.

The previous prime is 1021131131171. The next prime is 1021131131299. The reversal of 1021131131243 is 3421311311201.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1021131131243 - 2²² = 1021126936939 is a prime.

It is not a weakly prime, because it can be changed into another prime (1021131136243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510565565621 + 510565565622.

It is an arithmetic number, because the mean of its divisors is an integer number (510565565622).

Almost surely, 2^{1021131131243} is an apocalyptic number.

1021131131243 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021131131243 is an equidigital number, since it uses as much as digits as its factorization.

1021131131243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 432, while the sum is 23.

Adding to 1021131131243 its reverse (3421311311201), we get a palindrome (4442442442444).

The spelling of 1021131131243 in words is "one trillion, twenty-one billion, one hundred thirty-one million, one hundred thirty-one thousand, two hundred forty-three".