21011310331230 has 64 divisors (see below), whose sum is σ = 50477787360000. Its totient is φ = 5597390982144.

The previous prime is 21011310331189. The next prime is 21011310331279. The reversal of 21011310331230 is 3213301311012.

It is a happy number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 21011310331197 and 21011310331206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 192803617 + ... + 192912563.

It is an arithmetic number, because the mean of its divisors is an integer number (788715427500).

Almost surely, 2^{21011310331230} is an apocalyptic number.

21011310331230 is an abundant number, since it is smaller than the sum of its proper divisors (29466477028770).

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

21011310331230 is a wasteful number, since it uses less digits than its factorization.

21011310331230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115353.

The product of its (nonzero) digits is 324, while the sum is 21.

Adding to 21011310331230 its reverse (3213301311012), we get a palindrome (24224611642242).

The spelling of 21011310331230 in words is "twenty-one trillion, eleven billion, three hundred ten million, three hundred thirty-one thousand, two hundred thirty".