11123231230221 has 32 divisors (see below), whose sum is σ = 16228623974400. Its totient is φ = 6720800721600.

The previous prime is 11123231230187. The next prime is 11123231230229. The reversal of 11123231230221 is 12203213232111.

It is not a de Polignac number, because 11123231230221 - 2¹³ = 11123231222029 is a prime.

It is a super-2 number, since 2×11123231230221² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11123231230191 and 11123231230200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11123231230229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19243380 + ... + 19812978.

It is an arithmetic number, because the mean of its divisors is an integer number (507144499200).

Almost surely, 2^{11123231230221} is an apocalyptic number.

11123231230221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11123231230221 is a deficient number, since it is larger than the sum of its proper divisors (5105392744179).

11123231230221 is a wasteful number, since it uses less digits than its factorization.

11123231230221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571417.

The product of its (nonzero) digits is 864, while the sum is 24.

Adding to 11123231230221 its reverse (12203213232111), we get a palindrome (23326444462332).

The spelling of 11123231230221 in words is "eleven trillion, one hundred twenty-three billion, two hundred thirty-one million, two hundred thirty thousand, two hundred twenty-one".