221100331004304 has 40 divisors (see below), whose sum is σ = 590871574239360. Its totient is φ = 71158727219328.

The previous prime is 221100331004303. The next prime is 221100331004347. The reversal of 221100331004304 is 403400133001122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is not an unprimeable number, because it can be changed into a prime (221100331004303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 79418220952 + ... + 79418223735.

It is an arithmetic number, because the mean of its divisors is an integer number (14771789355984).

Almost surely, 2^{221100331004304} is an apocalyptic number.

221100331004304 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221100331004304 is an abundant number, since it is smaller than the sum of its proper divisors (369771243235056).

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

221100331004304 is a wasteful number, since it uses less digits than its factorization.

221100331004304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 158836444727 (or 158836444721 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

Adding to 221100331004304 its reverse (403400133001122), we get a palindrome (624500464005426).

The spelling of 221100331004304 in words is "two hundred twenty-one trillion, one hundred billion, three hundred thirty-one million, four thousand, three hundred four".