221101201224 has 24 divisors (see below), whose sum is σ = 598815753510. Its totient is φ = 73700400384.

The previous prime is 221101201201. The next prime is 221101201253. The reversal of 221101201224 is 422102101122.

221101201224 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 203283756900 + 17817444324 = 450870^2 + 133482^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 221101201197 and 221101201206.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1535424937 + ... + 1535425080.

Almost surely, 2^221101201224 is an apocalyptic number.

221101201224 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221101201224 is an abundant number, since it is smaller than the sum of its proper divisors (377714552286).

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

221101201224 is a wasteful number, since it uses less digits than its factorization.

221101201224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3070850029 (or 3070850022 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 221101201224 its reverse (422102101122), we get a palindrome (643203302346).

The spelling of 221101201224 in words is "two hundred twenty-one billion, one hundred one million, two hundred one thousand, two hundred twenty-four".