11230240021 has 48 divisors (see below), whose sum is σ = 15262918272. Its totient is φ = 8040320640.

The previous prime is 11230239989. The next prime is 11230240057. The reversal of 11230240021 is 12004203211.

It is not a de Polignac number, because 11230240021 - 2⁵ = 11230239989 is a prime.

It is a super-2 number, since 2×11230240021² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11230239977 and 11230240004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11230240081) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2497251 + ... + 2501743.

It is an arithmetic number, because the mean of its divisors is an integer number (317977464).

Almost surely, 2^11230240021 is an apocalyptic number.

11230240021 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11230240021 is a deficient number, since it is larger than the sum of its proper divisors (4032678251).

11230240021 is a wasteful number, since it uses less digits than its factorization.

11230240021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4762 (or 4751 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 16.

Adding to 11230240021 its reverse (12004203211), we get a palindrome (23234443232).

The spelling of 11230240021 in words is "eleven billion, two hundred thirty million, two hundred forty thousand, twenty-one".