11101110021221 has 16 divisors (see below), whose sum is σ = 12165585868800. Its totient is φ = 10045855457520.

The previous prime is 11101110021217. The next prime is 11101110021227. The reversal of 11101110021221 is 12212001110111.

It is a cyclic number.

It is not a de Polignac number, because 11101110021221 - 2² = 11101110021217 is a prime.

It is a super-2 number, since 2×11101110021221² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 11101110021196 and 11101110021205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11101110021227) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31465826 + ... + 31816668.

It is an arithmetic number, because the mean of its divisors is an integer number (760349116800).

Almost surely, 2^{11101110021221} is an apocalyptic number.

11101110021221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11101110021221 is a deficient number, since it is larger than the sum of its proper divisors (1064475847579).

11101110021221 is a wasteful number, since it uses less digits than its factorization.

11101110021221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363976.

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

Adding to 11101110021221 its reverse (12212001110111), we get a palindrome (23313111131332).

The spelling of 11101110021221 in words is "eleven trillion, one hundred one billion, one hundred ten million, twenty-one thousand, two hundred twenty-one".