11200120111221 has 4 divisors (see below), whose sum is σ = 14933493481632. Its totient is φ = 7466746740812.

The previous prime is 11200120111211. The next prime is 11200120111259. The reversal of 11200120111221 is 12211102100211.

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 11200120111221 - 2¹⁷ = 11200119980149 is a prime.

It is a super-2 number, since 2×11200120111221² (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 11200120111221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11200120111211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1866686685201 + ... + 1866686685206.

It is an arithmetic number, because the mean of its divisors is an integer number (3733373370408).

Almost surely, 2^{11200120111221} is an apocalyptic number.

It is an amenable number.

11200120111221 is a deficient number, since it is larger than the sum of its proper divisors (3733373370411).

11200120111221 is an equidigital number, since it uses as much as digits as its factorization.

11200120111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3733373370410.

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

Adding to 11200120111221 its reverse (12211102100211), we get a palindrome (23411222211432).

The spelling of 11200120111221 in words is "eleven trillion, two hundred billion, one hundred twenty million, one hundred eleven thousand, two hundred twenty-one".