11001111210221 has 8 divisors (see below), whose sum is σ = 12005037964224. Its totient is φ = 9997822078720.

The previous prime is 11001111210203. The next prime is 11001111210251. The reversal of 11001111210221 is 12201211110011.

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 11001111210221 - 2²² = 11001107015917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 11001111210196 and 11001111210205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11001111210251) 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, 159369545 + ... + 159438558.

It is an arithmetic number, because the mean of its divisors is an integer number (1500629745528).

Almost surely, 2^{11001111210221} is an apocalyptic number.

11001111210221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11001111210221 is a deficient number, since it is larger than the sum of its proper divisors (1003926754003).

11001111210221 is a wasteful number, since it uses less digits than its factorization.

11001111210221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318811251.

The product of its (nonzero) digits is 8, while the sum is 14.

Adding to 11001111210221 its reverse (12201211110011), we get a palindrome (23202322320232).

The spelling of 11001111210221 in words is "eleven trillion, one billion, one hundred eleven million, two hundred ten thousand, two hundred twenty-one".