21233201123 has 2 divisors, whose sum is σ = 21233201124. Its totient is φ = 21233201122.

The previous prime is 21233201107. The next prime is 21233201131. The reversal of 21233201123 is 32110233212.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 21233201123 - 2⁴ = 21233201107 is a prime.

It is a super-2 number, since 2×21233201123² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21233201095 and 21233201104.

It is not a weakly prime, because it can be changed into another prime (21233201153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616600561 + 10616600562.

It is an arithmetic number, because the mean of its divisors is an integer number (10616600562).

Almost surely, 2^21233201123 is an apocalyptic number.

21233201123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21233201123 is an equidigital number, since it uses as much as digits as its factorization.

21233201123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 20.

Adding to 21233201123 its reverse (32110233212), we get a palindrome (53343434335).

The spelling of 21233201123 in words is "twenty-one billion, two hundred thirty-three million, two hundred one thousand, one hundred twenty-three".