11121021100221 has 4 divisors (see below), whose sum is σ = 14828028133632. Its totient is φ = 7414014066812.

The previous prime is 11121021100207. The next prime is 11121021100261. The reversal of 11121021100221 is 12200112012111.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11121021100221 - 2¹⁸ = 11121020838077 is a prime.

It is a super-2 number, since 2×11121021100221² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11121021100221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11121021100261) 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, 1853503516701 + ... + 1853503516706.

It is an arithmetic number, because the mean of its divisors is an integer number (3707007033408).

Almost surely, 2^{11121021100221} is an apocalyptic number.

It is an amenable number.

11121021100221 is a deficient number, since it is larger than the sum of its proper divisors (3707007033411).

11121021100221 is an equidigital number, since it uses as much as digits as its factorization.

11121021100221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3707007033410.

The product of its (nonzero) digits is 16, while the sum is 15.

Adding to 11121021100221 its reverse (12200112012111), we get a palindrome (23321133112332).

The spelling of 11121021100221 in words is "eleven trillion, one hundred twenty-one billion, twenty-one million, one hundred thousand, two hundred twenty-one".