11101221205 has 16 divisors (see below), whose sum is σ = 13644094464. Its totient is φ = 8666280000.

The previous prime is 11101221191. The next prime is 11101221227. The reversal of 11101221205 is 50212210111.

It is not a de Polignac number, because 11101221205 - 2⁷ = 11101221077 is a prime.

It is a super-2 number, since 2×11101221205² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 209955 + ... + 257455.

It is an arithmetic number, because the mean of its divisors is an integer number (852755904).

Almost surely, 2^11101221205 is an apocalyptic number.

It is an amenable number.

11101221205 is a deficient number, since it is larger than the sum of its proper divisors (2542873259).

11101221205 is a wasteful number, since it uses less digits than its factorization.

11101221205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48636.

The product of its (nonzero) digits is 40, while the sum is 16.

Adding to 11101221205 its reverse (50212210111), we get a palindrome (61313431316).

The spelling of 11101221205 in words is "eleven billion, one hundred one million, two hundred twenty-one thousand, two hundred five".