10011101221091 has 4 divisors (see below), whose sum is σ = 10599989528232. Its totient is φ = 9422212913952.

The previous prime is 10011101221039. The next prime is 10011101221123. The reversal of 10011101221091 is 19012210111001.

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 10011101221091 - 2¹⁰ = 10011101220067 is a prime.

It is a super-2 number, since 2×10011101221091² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (10011101221031) 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 in 3 ways as a sum of consecutive naturals, for example, 294444153545 + ... + 294444153578.

It is an arithmetic number, because the mean of its divisors is an integer number (2649997382058).

Almost surely, 2^{10011101221091} is an apocalyptic number.

10011101221091 is a deficient number, since it is larger than the sum of its proper divisors (588888307141).

10011101221091 is an equidigital number, since it uses as much as digits as its factorization.

10011101221091 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 588888307140.

The product of its (nonzero) digits is 36, while the sum is 20.

Adding to 10011101221091 its reverse (19012210111001), we get a palindrome (29023311332092).

The spelling of 10011101221091 in words is "ten trillion, eleven billion, one hundred one million, two hundred twenty-one thousand, ninety-one".