1022131291 has 2 divisors, whose sum is σ = 1022131292. Its totient is φ = 1022131290.

The previous prime is 1022131289. The next prime is 1022131337. The reversal of 1022131291 is 1921312201.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1022131291 - 2¹ = 1022131289 is a prime.

Together with 1022131289, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1022131991) 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, 511065645 + 511065646.

It is an arithmetic number, because the mean of its divisors is an integer number (511065646).

Almost surely, 2^1022131291 is an apocalyptic number.

1022131291 is a deficient number, since it is larger than the sum of its proper divisors (1).

1022131291 is an equidigital number, since it uses as much as digits as its factorization.

1022131291 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216, while the sum is 22.

The square root of 1022131291 is about 31970.7880885035. The cubic root of 1022131291 is about 1007.3233348469.

Adding to 1022131291 its reverse (1921312201), we get a palindrome (2943443492).

The spelling of 1022131291 in words is "one billion, twenty-two million, one hundred thirty-one thousand, two hundred ninety-one".