221303820124 has 48 divisors (see below), whose sum is σ = 422174446848. Its totient is φ = 101096771328.

The previous prime is 221303820121. The next prime is 221303820137. The reversal of 221303820124 is 421028303122.

It is a junction number, because it is equal to n+sod(n) for n = 221303820092 and 221303820101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221303820121) 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, 244449 + ... + 708775.

It is an arithmetic number, because the mean of its divisors is an integer number (8795300976).

Almost surely, 2^221303820124 is an apocalyptic number.

It is an amenable number.

221303820124 is a deficient number, since it is larger than the sum of its proper divisors (200870626724).

221303820124 is a wasteful number, since it uses less digits than its factorization.

221303820124 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 464554 (or 464552 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 28.

The spelling of 221303820124 in words is "two hundred twenty-one billion, three hundred three million, eight hundred twenty thousand, one hundred twenty-four".