11331011221 has 8 divisors (see below), whose sum is σ = 11743135488. Its totient is φ = 10921800000.

The previous prime is 11331011213. The next prime is 11331011231. The reversal of 11331011221 is 12211013311.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11331011221 - 2³ = 11331011213 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11331011195 and 11331011204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331011231) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 720340 + ... + 735901.

It is an arithmetic number, because the mean of its divisors is an integer number (1467891936).

Almost surely, 2^11331011221 is an apocalyptic number.

It is an amenable number.

11331011221 is a deficient number, since it is larger than the sum of its proper divisors (412124267).

11331011221 is a wasteful number, since it uses less digits than its factorization.

11331011221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1456523.

The product of its (nonzero) digits is 36, while the sum is 16.

Adding to 11331011221 its reverse (12211013311), we get a palindrome (23542024532).

The spelling of 11331011221 in words is "eleven billion, three hundred thirty-one million, eleven thousand, two hundred twenty-one".