23201121321 has 24 divisors (see below), whose sum is σ = 39335409984. Its totient is φ = 12899463840.

The previous prime is 23201121301. The next prime is 23201121329. The reversal of 23201121321 is 12312110232.

23201121321 is a `hidden beast` number, since 2 + 320 + 1 + 1 + 21 + 321 = 666.

It is not a de Polignac number, because 23201121321 - 2⁶ = 23201121257 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23201121294 and 23201121303.

It is not an unprimeable number, because it can be changed into a prime (23201121329) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4974315 + ... + 4978976.

It is an arithmetic number, because the mean of its divisors is an integer number (1638975416).

Almost surely, 2^23201121321 is an apocalyptic number.

23201121321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23201121321 is a deficient number, since it is larger than the sum of its proper divisors (16134288663).

23201121321 is a wasteful number, since it uses less digits than its factorization.

23201121321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9953341 (or 9953338 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

Adding to 23201121321 its reverse (12312110232), we get a palindrome (35513231553).

The spelling of 23201121321 in words is "twenty-three billion, two hundred one million, one hundred twenty-one thousand, three hundred twenty-one".