21230130123 has 12 divisors (see below), whose sum is σ = 30732269568. Its totient is φ = 14122715760.

The previous prime is 21230130083. The next prime is 21230130127. The reversal of 21230130123 is 32103103212.

21230130123 is a `hidden beast` number, since 212 + 301 + 30 + 123 = 666.

It is not a de Polignac number, because 21230130123 - 2⁹ = 21230129611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21230130096 and 21230130105.

It is not an unprimeable number, because it can be changed into a prime (21230130127) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2554315 + ... + 2562612.

It is an arithmetic number, because the mean of its divisors is an integer number (2561022464).

Almost surely, 2^21230130123 is an apocalyptic number.

21230130123 is a deficient number, since it is larger than the sum of its proper divisors (9502139445).

21230130123 is a wasteful number, since it uses less digits than its factorization.

21230130123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5117394 (or 5117391 counting only the distinct ones).

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

Adding to 21230130123 its reverse (32103103212), we get a palindrome (53333233335).

The spelling of 21230130123 in words is "twenty-one billion, two hundred thirty million, one hundred thirty thousand, one hundred twenty-three".