21123032230 has 16 divisors (see below), whose sum is σ = 38027705040. Its totient is φ = 8447824672.

The previous prime is 21123032221. The next prime is 21123032239. The reversal of 21123032230 is 3223032112.

It is an interprime number because it is at equal distance from previous prime (21123032221) and next prime (21123032239).

It is a junction number, because it is equal to n+sod(n) for n = 21123032198 and 21123032207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21123032239) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108460 + ... + 232399.

It is an arithmetic number, because the mean of its divisors is an integer number (2376731565).

Almost surely, 2^21123032230 is an apocalyptic number.

21123032230 is a deficient number, since it is larger than the sum of its proper divisors (16904672810).

21123032230 is a wasteful number, since it uses less digits than its factorization.

21123032230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 347063.

The product of its (nonzero) digits is 432, while the sum is 19.

Adding to 21123032230 its reverse (3223032112), we get a palindrome (24346064342).

The spelling of 21123032230 in words is "twenty-one billion, one hundred twenty-three million, thirty-two thousand, two hundred thirty".