11231221110021 has 20 divisors (see below), whose sum is σ = 18302730699264. Its totient is φ = 6806800672200.

The previous prime is 11231221109993. The next prime is 11231221110073. The reversal of 11231221110021 is 12001112213211.

It is a happy number.

11231221110021 is a `hidden beast` number, since 112 + 312 + 211 + 10 + 0 + 21 = 666.

It is not a de Polignac number, because 11231221110021 - 2¹⁵ = 11231221077253 is a prime.

It is a super-2 number, since 2×11231221110021² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11231221109976 and 11231221110003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11231221110821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6302592325 + ... + 6302594106.

Almost surely, 2^{11231221110021} is an apocalyptic number.

11231221110021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11231221110021 is a deficient number, since it is larger than the sum of its proper divisors (7071509589243).

11231221110021 is a wasteful number, since it uses less digits than its factorization.

11231221110021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12605186454 (or 12605186445 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 18.

Adding to 11231221110021 its reverse (12001112213211), we get a palindrome (23232333323232).

The spelling of 11231221110021 in words is "eleven trillion, two hundred thirty-one billion, two hundred twenty-one million, one hundred ten thousand, twenty-one".