21230032130 has 16 divisors (see below), whose sum is σ = 38216186424. Its totient is φ = 8491539840.

The previous prime is 21230032099. The next prime is 21230032141. The reversal of 21230032130 is 3123003212.

21230032130 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 20349307801 + 880724329 = 142651^2 + 29677^2 .

It is a junction number, because it is equal to n+sod(n) for n = 21230032099 and 21230032108.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 172640 + ... + 268820.

Almost surely, 2^21230032130 is an apocalyptic number.

21230032130 is a deficient number, since it is larger than the sum of its proper divisors (16986154294).

21230032130 is a wasteful number, since it uses less digits than its factorization.

21230032130 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118261.

The product of its (nonzero) digits is 216, while the sum is 17.

Adding to 21230032130 its reverse (3123003212), we get a palindrome (24353035342).

The spelling of 21230032130 in words is "twenty-one billion, two hundred thirty million, thirty-two thousand, one hundred thirty".