1001011222091 has 2 divisors, whose sum is σ = 1001011222092. Its totient is φ = 1001011222090.

The previous prime is 1001011222051. The next prime is 1001011222151. The reversal of 1001011222091 is 1902221101001.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1001011222091 - 2²⁶ = 1000944113227 is a prime.

It is not a weakly prime, because it can be changed into another prime (1001011222031) 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, 500505611045 + 500505611046.

It is an arithmetic number, because the mean of its divisors is an integer number (500505611046).

Almost surely, 2^{1001011222091} is an apocalyptic number.

1001011222091 is a deficient number, since it is larger than the sum of its proper divisors (1).

1001011222091 is an equidigital number, since it uses as much as digits as its factorization.

1001011222091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72, while the sum is 20.

Adding to 1001011222091 its reverse (1902221101001), we get a palindrome (2903232323092).

The spelling of 1001011222091 in words is "one trillion, one billion, eleven million, two hundred twenty-two thousand, ninety-one".