1001222010091 has 4 divisors (see below), whose sum is σ = 1001785445752. Its totient is φ = 1000658574432.

The previous prime is 1001222010077. The next prime is 1001222010199. The reversal of 1001222010091 is 1900102221001.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1001222010091 - 2¹⁵ = 1001221977323 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1001222010011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 281715165 + ... + 281718718.

It is an arithmetic number, because the mean of its divisors is an integer number (250446361438).

Almost surely, 2^{1001222010091} is an apocalyptic number.

1001222010091 is a deficient number, since it is larger than the sum of its proper divisors (563435661).

1001222010091 is an equidigital number, since it uses as much as digits as its factorization.

1001222010091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563435660.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 1001222010091 its reverse (1900102221001), we get a palindrome (2901324231092).

The spelling of 1001222010091 in words is "one trillion, one billion, two hundred twenty-two million, ten thousand, ninety-one".