11101220211001 has 8 divisors (see below), whose sum is σ = 11387004144264. Its totient is φ = 10816151633280.

The previous prime is 11101220210987. The next prime is 11101220211023. The reversal of 11101220211001 is 10011202210111.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 149323507776 + 10951896703225 = 386424^2 + 3309365^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11101220211001 is a prime.

It is a super-2 number, since 2×11101220211001² (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 (11101220211101) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 178807450 + ... + 178869523.

It is an arithmetic number, because the mean of its divisors is an integer number (1423375518033).

Almost surely, 2^{11101220211001} is an apocalyptic number.

It is an amenable number.

11101220211001 is a deficient number, since it is larger than the sum of its proper divisors (285783933263).

11101220211001 is an equidigital number, since it uses as much as digits as its factorization.

11101220211001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357677771.

The product of its (nonzero) digits is 8, while the sum is 13.

Adding to 11101220211001 its reverse (10011202210111), we get a palindrome (21112422421112).

The spelling of 11101220211001 in words is "eleven trillion, one hundred one billion, two hundred twenty million, two hundred eleven thousand, one".