221324430020 has 24 divisors (see below), whose sum is σ = 464923531968. Its totient is φ = 88502680800.

The previous prime is 221324429947. The next prime is 221324430043. The reversal of 221324430020 is 20034423122.

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, 1626146 + ... + 1756985.

It is an arithmetic number, because the mean of its divisors is an integer number (19371813832).

Almost surely, 2^221324430020 is an apocalyptic number.

221324430020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221324430020 is an abundant number, since it is smaller than the sum of its proper divisors (243599101948).

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

221324430020 is a wasteful number, since it uses less digits than its factorization.

221324430020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3386411 (or 3386409 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 23.

Adding to 221324430020 its reverse (20034423122), we get a palindrome (241358853142).

The spelling of 221324430020 in words is "two hundred twenty-one billion, three hundred twenty-four million, four hundred thirty thousand, twenty".