21011313202230 has 256 divisors, whose sum is σ = 55944199342080. Its totient is φ = 5016893386752.

The previous prime is 21011313202223. The next prime is 21011313202241. The reversal of 21011313202230 is 3220231311012.

It is a junction number, because it is equal to n+sod(n) for n = 21011313202197 and 21011313202206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 8780321914 + ... + 8780324306.

It is an arithmetic number, because the mean of its divisors is an integer number (218532028680).

Almost surely, 2^{21011313202230} is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 21011313202230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27972099671040).

21011313202230 is an abundant number, since it is smaller than the sum of its proper divisors (34932886139850).

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

21011313202230 is a wasteful number, since it uses less digits than its factorization.

21011313202230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4055.

The product of its (nonzero) digits is 432, while the sum is 21.

Adding to 21011313202230 its reverse (3220231311012), we get a palindrome (24231544513242).

The spelling of 21011313202230 in words is "twenty-one trillion, eleven billion, three hundred thirteen million, two hundred two thousand, two hundred thirty".