11033311221 has 24 divisors (see below), whose sum is σ = 16127691840. Its totient is φ = 7267651776.

The previous prime is 11033311213. The next prime is 11033311259. The reversal of 11033311221 is 12211333011.

11033311221 is a `hidden beast` number, since 110 + 3 + 331 + 1 + 221 = 666.

It is not a de Polignac number, because 11033311221 - 2³ = 11033311213 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 11033311194 and 11033311203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11033311291) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1331136 + ... + 1339398.

It is an arithmetic number, because the mean of its divisors is an integer number (671987160).

Almost surely, 2^11033311221 is an apocalyptic number.

It is an amenable number.

11033311221 is a deficient number, since it is larger than the sum of its proper divisors (5094380619).

11033311221 is a wasteful number, since it uses less digits than its factorization.

11033311221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10025 (or 10022 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 18.

Adding to 11033311221 its reverse (12211333011), we get a palindrome (23244644232).

The spelling of 11033311221 in words is "eleven billion, thirty-three million, three hundred eleven thousand, two hundred twenty-one".