221300424020 has 48 divisors (see below), whose sum is σ = 511127947008. Its totient is φ = 79972391040.

The previous prime is 221300424011. The next prime is 221300424049. The reversal of 221300424020 is 20424003122.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 221300423983 and 221300424001.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9042626 + ... + 9067065.

It is an arithmetic number, because the mean of its divisors is an integer number (10648498896).

Almost surely, 2^221300424020 is an apocalyptic number.

221300424020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221300424020 is an abundant number, since it is smaller than the sum of its proper divisors (289827522988).

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

221300424020 is a wasteful number, since it uses less digits than its factorization.

221300424020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18109760 (or 18109758 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

Adding to 221300424020 its reverse (20424003122), we get a palindrome (241724427142).

The spelling of 221300424020 in words is "two hundred twenty-one billion, three hundred million, four hundred twenty-four thousand, twenty".