21221331302230 has 16 divisors (see below), whose sum is σ = 39086731143504. Its totient is φ = 8291124787680.

The previous prime is 21221331302203. The next prime is 21221331302243. The reversal of 21221331302230 is 3220313312212.

It is a junction number, because it is equal to n+sod(n) for n = 21221331302195 and 21221331302204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24675966201 + ... + 24675967060.

It is an arithmetic number, because the mean of its divisors is an integer number (2442920696469).

Almost surely, 2^{21221331302230} is an apocalyptic number.

21221331302230 is a deficient number, since it is larger than the sum of its proper divisors (17865399841274).

21221331302230 is a wasteful number, since it uses less digits than its factorization.

21221331302230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49351933311.

The product of its (nonzero) digits is 2592, while the sum is 25.

Adding to 21221331302230 its reverse (3220313312212), we get a palindrome (24441644614442).

The spelling of 21221331302230 in words is "twenty-one trillion, two hundred twenty-one billion, three hundred thirty-one million, three hundred two thousand, two hundred thirty".