1021131331271 has 2 divisors, whose sum is σ = 1021131331272. Its totient is φ = 1021131331270.

The previous prime is 1021131331243. The next prime is 1021131331291. The reversal of 1021131331271 is 1721331311201.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1021131331271 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1021131331271.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1021131331291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 510565665635 + 510565665636.

It is an arithmetic number, because the mean of its divisors is an integer number (510565665636).

Almost surely, 2^{1021131331271} is an apocalyptic number.

1021131331271 is a deficient number, since it is larger than the sum of its proper divisors (1).

1021131331271 is an equidigital number, since it uses as much as digits as its factorization.

1021131331271 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756, while the sum is 26.

Adding to 1021131331271 its reverse (1721331311201), we get a palindrome (2742462642472).

The spelling of 1021131331271 in words is "one trillion, twenty-one billion, one hundred thirty-one million, three hundred thirty-one thousand, two hundred seventy-one".