11202220121 has 12 divisors (see below), whose sum is σ = 11748601620. Its totient is φ = 10674760320.

The previous prime is 11202220009. The next prime is 11202220147. The reversal of 11202220121 is 12102220211.

It can be written as a sum of positive squares in 2 ways, for example, as 1034522896 + 10167697225 = 32164^2 + 100835^2 .

It is a de Polignac number, because none of the positive numbers 2^k-11202220121 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11202220096 and 11202220105.

It is not an unprimeable number, because it can be changed into a prime (11202220181) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1925 + ... + 149693.

It is an arithmetic number, because the mean of its divisors is an integer number (979050135).

Almost surely, 2^11202220121 is an apocalyptic number.

It is an amenable number.

11202220121 is a deficient number, since it is larger than the sum of its proper divisors (546381499).

11202220121 is an equidigital number, since it uses as much as digits as its factorization.

11202220121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 147896 (or 147853 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 11202220121 its reverse (12102220211), we get a palindrome (23304440332).

The spelling of 11202220121 in words is "eleven billion, two hundred two million, two hundred twenty thousand, one hundred twenty-one".