21213113230233 has 10 divisors (see below), whose sum is σ = 31688724702074. Its totient is φ = 14142075486768.

The previous prime is 21213113230223. The next prime is 21213113230241. The reversal of 21213113230233 is 33203231131212.

21213113230233 is a `hidden beast` number, since 2 + 1 + 2 + 1 + 311 + 323 + 0 + 23 + 3 = 666.

It can be written as a sum of positive squares in only one way, i.e., 14945360641929 + 6267752588304 = 3865923^2 + 2503548^2 .

It is not a de Polignac number, because 21213113230233 - 2¹⁴ = 21213113213849 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 21213113230197 and 21213113230206.

It is not an unprimeable number, because it can be changed into a prime (21213113230213) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 130945143316 + ... + 130945143477.

Almost surely, 2^{21213113230233} is an apocalyptic number.

It is an amenable number.

21213113230233 is a deficient number, since it is larger than the sum of its proper divisors (10475611471841).

21213113230233 is an equidigital number, since it uses as much as digits as its factorization.

21213113230233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261890286805 (or 261890286796 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 27.

Adding to 21213113230233 its reverse (33203231131212), we get a palindrome (54416344361445).

The spelling of 21213113230233 in words is "twenty-one trillion, two hundred thirteen billion, one hundred thirteen million, two hundred thirty thousand, two hundred thirty-three".