21130230323 has 16 divisors (see below), whose sum is σ = 22600166400. Its totient is φ = 19722649440.

The previous prime is 21130230313. The next prime is 21130230347. The reversal of 21130230323 is 32303203112.

It is a cyclic number.

It is not a de Polignac number, because 21130230323 - 2¹⁶ = 21130164787 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21130230295 and 21130230304.

It is not an unprimeable number, because it can be changed into a prime (21130230313) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12053 + ... + 205926.

It is an arithmetic number, because the mean of its divisors is an integer number (1412510400).

Almost surely, 2^21130230323 is an apocalyptic number.

21130230323 is a deficient number, since it is larger than the sum of its proper divisors (1469936077).

21130230323 is a wasteful number, since it uses less digits than its factorization.

21130230323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218122.

The product of its (nonzero) digits is 648, while the sum is 20.

Adding to 21130230323 its reverse (32303203112), we get a palindrome (53433433435).

The spelling of 21130230323 in words is "twenty-one billion, one hundred thirty million, two hundred thirty thousand, three hundred twenty-three".