11202211021 has 4 divisors (see below), whose sum is σ = 11229600700. Its totient is φ = 11174821344.

The previous prime is 11202211001. The next prime is 11202211039. The reversal of 11202211021 is 12011220211.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 12011220211 = 337 ⋅35641603.

It can be written as a sum of positive squares in 2 ways, for example, as 9151026921 + 2051184100 = 95661^2 + 45290^2 .

It is a cyclic number.

It is not a de Polignac number, because 11202211021 - 2⁵ = 11202210989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11202210992 and 11202211010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11202211001) 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, 13694226 + ... + 13695043.

It is an arithmetic number, because the mean of its divisors is an integer number (2807400175).

Almost surely, 2^11202211021 is an apocalyptic number.

It is an amenable number.

11202211021 is a deficient number, since it is larger than the sum of its proper divisors (27389679).

11202211021 is an equidigital number, since it uses as much as digits as its factorization.

11202211021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27389678.

The product of its (nonzero) digits is 16, while the sum is 13.

Adding to 11202211021 its reverse (12011220211), we get a palindrome (23213431232).

The spelling of 11202211021 in words is "eleven billion, two hundred two million, two hundred eleven thousand, twenty-one".