21012313303230 has 32 divisors (see below), whose sum is σ = 50447203359264. Its totient is φ = 5601322277376.

The previous prime is 21012313303229. The next prime is 21012313303357. The reversal of 21012313303230 is 3230331321012.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 21012313303230.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 122492247 + ... + 122663666.

It is an arithmetic number, because the mean of its divisors is an integer number (1576475104977).

Almost surely, 2^{21012313303230} is an apocalyptic number.

21012313303230 is an abundant number, since it is smaller than the sum of its proper divisors (29434890056034).

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

21012313303230 is a wasteful number, since it uses less digits than its factorization.

21012313303230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 245158780.

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 21012313303230 its reverse (3230331321012), we get a palindrome (24242644624242).

The spelling of 21012313303230 in words is "twenty-one trillion, twelve billion, three hundred thirteen million, three hundred three thousand, two hundred thirty".