30221203205500 has 48 divisors (see below), whose sum is σ = 66098626802208. Its totient is φ = 12070986960000.

The previous prime is 30221203205449. The next prime is 30221203205507. The reversal of 30221203205500 is 550230212203.

It is a super-2 number, since 2×30221203205500² (a number of 28 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30221203205507) 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, 43389961 + ... + 44080960.

It is an arithmetic number, because the mean of its divisors is an integer number (1377054725046).

Almost surely, 2^{30221203205500} is an apocalyptic number.

It is an amenable number.

30221203205500 is an abundant number, since it is smaller than the sum of its proper divisors (35877423596708).

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

30221203205500 is a wasteful number, since it uses less digits than its factorization.

30221203205500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87471631 (or 87471619 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 25.

Adding to 30221203205500 its reverse (550230212203), we get a palindrome (30771433417703).

The spelling of 30221203205500 in words is "thirty trillion, two hundred twenty-one billion, two hundred three million, two hundred five thousand, five hundred".