221230000020 has 96 divisors (see below), whose sum is σ = 622756366848. Its totient is φ = 58679949312.

The previous prime is 221230000007. The next prime is 221230000027. The reversal of 221230000020 is 20000032122.

221230000020 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a junction number, because it is equal to n+sod(n) for n = 221229999960 and 221230000005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221230000027) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9844437 + ... + 9866883.

It is an arithmetic number, because the mean of its divisors is an integer number (6487045488).

Almost surely, 2^221230000020 is an apocalyptic number.

221230000020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221230000020 is an abundant number, since it is smaller than the sum of its proper divisors (401526366828).

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

221230000020 is a wasteful number, since it uses less digits than its factorization.

221230000020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23329 (or 23327 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

Adding to 221230000020 its reverse (20000032122), we get a palindrome (241230032142).

The spelling of 221230000020 in words is "two hundred twenty-one billion, two hundred thirty million, twenty", and thus it is an aban number.