21232130123 has 2 divisors, whose sum is σ = 21232130124. Its totient is φ = 21232130122.

The previous prime is 21232130119. The next prime is 21232130147. The reversal of 21232130123 is 32103123212.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21232130123 - 2² = 21232130119 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21232130095 and 21232130104.

It is not a weakly prime, because it can be changed into another prime (21232130923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10616065061 + 10616065062.

It is an arithmetic number, because the mean of its divisors is an integer number (10616065062).

Almost surely, 2^21232130123 is an apocalyptic number.

21232130123 is a deficient number, since it is larger than the sum of its proper divisors (1).

21232130123 is an equidigital number, since it uses as much as digits as its factorization.

21232130123 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 21232130123 its reverse (32103123212), we get a palindrome (53335253335).

The spelling of 21232130123 in words is "twenty-one billion, two hundred thirty-two million, one hundred thirty thousand, one hundred twenty-three".