23031210321 has 24 divisors (see below), whose sum is σ = 38042756544. Its totient is φ = 13152736800.

The previous prime is 23031210289. The next prime is 23031210329. The reversal of 23031210321 is 12301213032.

23031210321 is a `hidden beast` number, since 2 + 30 + 312 + 1 + 0 + 321 = 666.

It is not a de Polignac number, because 23031210321 - 2⁵ = 23031210289 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 23031210294 and 23031210303.

It is not an unprimeable number, because it can be changed into a prime (23031210329) 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, 4630 + ... + 214671.

It is an arithmetic number, because the mean of its divisors is an integer number (1585114856).

Almost surely, 2^23031210321 is an apocalyptic number.

23031210321 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

23031210321 is a deficient number, since it is larger than the sum of its proper divisors (15011546223).

23031210321 is a wasteful number, since it uses less digits than its factorization.

23031210321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 220981 (or 220978 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 18.

Adding to 23031210321 its reverse (12301213032), we get a palindrome (35332423353).

The spelling of 23031210321 in words is "twenty-three billion, thirty-one million, two hundred ten thousand, three hundred twenty-one".