221301030020 has 24 divisors (see below), whose sum is σ = 531122472384. Its totient is φ = 75874638816.

The previous prime is 221301030001. The next prime is 221301030023. The reversal of 221301030020 is 20030103122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a junction number, because it is equal to n+sod(n) for n = 221301029977 and 221301030004.

It is not an unprimeable number, because it can be changed into a prime (221301030023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 790360682 + ... + 790360961.

It is an arithmetic number, because the mean of its divisors is an integer number (22130103016).

Almost surely, 2^221301030020 is an apocalyptic number.

221301030020 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221301030020 is an abundant number, since it is smaller than the sum of its proper divisors (309821442364).

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

221301030020 is a wasteful number, since it uses less digits than its factorization.

221301030020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1580721659 (or 1580721657 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

Adding to 221301030020 its reverse (20030103122), we get a palindrome (241331133142).

The spelling of 221301030020 in words is "two hundred twenty-one billion, three hundred one million, thirty thousand, twenty".