21321121122230 has 32 divisors (see below), whose sum is σ = 38489956782624. Its totient is φ = 8503574881536.

The previous prime is 21321121122181. The next prime is 21321121122239. The reversal of 21321121122230 is 3222112112312.

It is a junction number, because it is equal to n+sod(n) for n = 21321121122196 and 21321121122205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21321121122239) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 118629314 + ... + 118808906.

It is an arithmetic number, because the mean of its divisors is an integer number (1202811149457).

Almost surely, 2^{21321121122230} is an apocalyptic number.

21321121122230 is a deficient number, since it is larger than the sum of its proper divisors (17168835660394).

21321121122230 is a wasteful number, since it uses less digits than its factorization.

21321121122230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 214160.

The product of its (nonzero) digits is 576, while the sum is 23.

Adding to 21321121122230 its reverse (3222112112312), we get a palindrome (24543233234542).

The spelling of 21321121122230 in words is "twenty-one trillion, three hundred twenty-one billion, one hundred twenty-one million, one hundred twenty-two thousand, two hundred thirty".