21012302230230 has 128 divisors (see below), whose sum is σ = 52261701811200. Its totient is φ = 5400402061824.

The previous prime is 21012302230223. The next prime is 21012302230273. The reversal of 21012302230230 is 3203220321012.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 21012302230197 and 21012302230206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2323594089 + ... + 2323603131.

It is an arithmetic number, because the mean of its divisors is an integer number (408294545400).

Almost surely, 2^{21012302230230} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21012302230230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26130850905600).

21012302230230 is an abundant number, since it is smaller than the sum of its proper divisors (31249399580970).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21012302230230 is a wasteful number, since it uses less digits than its factorization.

21012302230230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13558.

The product of its (nonzero) digits is 864, while the sum is 21.

Adding to 21012302230230 its reverse (3203220321012), we get a palindrome (24215522551242).

The spelling of 21012302230230 in words is "twenty-one trillion, twelve billion, three hundred two million, two hundred thirty thousand, two hundred thirty".