11333321221 has 4 divisors (see below), whose sum is σ = 11334376332. Its totient is φ = 11332266112.

The previous prime is 11333321203. The next prime is 11333321239. The reversal of 11333321221 is 12212333311.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (11333321203) and next prime (11333321239).

It can be written as a sum of positive squares in 2 ways, for example, as 6243212196 + 5090109025 = 79014^2 + 71345^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11333321221 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11333321192 and 11333321201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11333327221) 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, 511276 + ... + 532981.

It is an arithmetic number, because the mean of its divisors is an integer number (2833594083).

Almost surely, 2^11333321221 is an apocalyptic number.

It is an amenable number.

11333321221 is a deficient number, since it is larger than the sum of its proper divisors (1055111).

11333321221 is a wasteful number, since it uses less digits than its factorization.

11333321221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1055110.

The product of its digits is 648, while the sum is 22.

Adding to 11333321221 its reverse (12212333311), we get a palindrome (23545654532).

The spelling of 11333321221 in words is "eleven billion, three hundred thirty-three million, three hundred twenty-one thousand, two hundred twenty-one".