11201121211021 has 6 divisors (see below), whose sum is σ = 13029875694510. Its totient is φ = 9600961037976.

The previous prime is 11201121211013. The next prime is 11201121211057. The reversal of 11201121211021 is 12011212110211.

It can be written as a sum of positive squares in only one way, i.e., 6842859564996 + 4358261646025 = 2615886^2 + 2087645^2 .

It is not a de Polignac number, because 11201121211021 - 2³ = 11201121211013 is a prime.

It is a super-2 number, since 2×11201121211021² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11201121210986 and 11201121211004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11201121217021) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 114297155166 + ... + 114297155263.

It is an arithmetic number, because the mean of its divisors is an integer number (2171645949085).

Almost surely, 2^{11201121211021} is an apocalyptic number.

It is an amenable number.

11201121211021 is a deficient number, since it is larger than the sum of its proper divisors (1828754483489).

11201121211021 is an equidigital number, since it uses as much as digits as its factorization.

11201121211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228594310443 (or 228594310436 counting only the distinct ones).

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

Adding to 11201121211021 its reverse (12011212110211), we get a palindrome (23212333321232).

The spelling of 11201121211021 in words is "eleven trillion, two hundred one billion, one hundred twenty-one million, two hundred eleven thousand, twenty-one".