10320123111221 has 32 divisors (see below), whose sum is σ = 12987768821760. Its totient is φ = 7965963345600.

The previous prime is 10320123111169. The next prime is 10320123111241. The reversal of 10320123111221 is 12211132102301.

It is a cyclic number.

It is not a de Polignac number, because 10320123111221 - 2¹⁸ = 10320122849077 is a prime.

It is a super-3 number, since 3×10320123111221³ (a number of 40 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

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 = 10320123111193 and 10320123111202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10320123111241) 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 31 ways as a sum of consecutive naturals, for example, 159054416 + ... + 159119286.

It is an arithmetic number, because the mean of its divisors is an integer number (405867775680).

Almost surely, 2^{10320123111221} is an apocalyptic number.

10320123111221 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

10320123111221 is a deficient number, since it is larger than the sum of its proper divisors (2667645710539).

10320123111221 is a wasteful number, since it uses less digits than its factorization.

10320123111221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84305.

The product of its (nonzero) digits is 144, while the sum is 20.

Adding to 10320123111221 its reverse (12211132102301), we get a palindrome (22531255213522).

The spelling of 10320123111221 in words is "ten trillion, three hundred twenty billion, one hundred twenty-three million, one hundred eleven thousand, two hundred twenty-one".