11001231131221 has 8 divisors (see below), whose sum is σ = 11919254523264. Its totient is φ = 10113306866880.

The previous prime is 11001231131213. The next prime is 11001231131249. The reversal of 11001231131221 is 12213113210011.

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 11001231131221 - 2³ = 11001231131213 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 (11001231731221) 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, 7524781165 + ... + 7524782626.

It is an arithmetic number, because the mean of its divisors is an integer number (1489906815408).

Almost surely, 2^{11001231131221} is an apocalyptic number.

It is an amenable number.

11001231131221 is a deficient number, since it is larger than the sum of its proper divisors (918023392043).

11001231131221 is a wasteful number, since it uses less digits than its factorization.

11001231131221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15049563851.

The product of its (nonzero) digits is 72, while the sum is 19.

Adding to 11001231131221 its reverse (12213113210011), we get a palindrome (23214344341232).

The spelling of 11001231131221 in words is "eleven trillion, one billion, two hundred thirty-one million, one hundred thirty-one thousand, two hundred twenty-one".