2201113521 has 10 divisors (see below), whose sum is σ = 3288083282. Its totient is φ = 1467408960.

The previous prime is 2201113513. The next prime is 2201113549. The reversal of 2201113521 is 1253111022.

It can be written as a sum of positive squares in only one way, i.e., 2106810000 + 94303521 = 45900^2 + 9711^2 .

It is not a de Polignac number, because 2201113521 - 2³ = 2201113513 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 = 2201113494 and 2201113503.

It is not an unprimeable number, because it can be changed into a prime (2201113591) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 13587040 + ... + 13587201.

Almost surely, 2^2201113521 is an apocalyptic number.

It is an amenable number.

2201113521 is a deficient number, since it is larger than the sum of its proper divisors (1086969761).

2201113521 is an equidigital number, since it uses as much as digits as its factorization.

2201113521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27174253 (or 27174244 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 18.

The square root of 2201113521 is about 46916.0262703482. The cubic root of 2201113521 is about 1300.8108395207.

Adding to 2201113521 its reverse (1253111022), we get a palindrome (3454224543).

The spelling of 2201113521 in words is "two billion, two hundred one million, one hundred thirteen thousand, five hundred twenty-one".