11331230231221 has 4 divisors (see below), whose sum is σ = 11338027611552. Its totient is φ = 11324432850892.

The previous prime is 11331230231207. The next prime is 11331230231263. The reversal of 11331230231221 is 12213203213311.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 11331230231221 - 2⁷ = 11331230231093 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11331230231281) 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, 3398687665 + ... + 3398690998.

It is an arithmetic number, because the mean of its divisors is an integer number (2834506902888).

Almost surely, 2^{11331230231221} is an apocalyptic number.

It is an amenable number.

11331230231221 is a deficient number, since it is larger than the sum of its proper divisors (6797380331).

11331230231221 is an equidigital number, since it uses as much as digits as its factorization.

11331230231221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6797380330.

The product of its (nonzero) digits is 1296, while the sum is 25.

Adding to 11331230231221 its reverse (12213203213311), we get a palindrome (23544433444532).

The spelling of 11331230231221 in words is "eleven trillion, three hundred thirty-one billion, two hundred thirty million, two hundred thirty-one thousand, two hundred twenty-one".