221224312011 has 8 divisors (see below), whose sum is σ = 296140912704. Its totient is φ = 146895293000.

The previous prime is 221224312009. The next prime is 221224312033. The reversal of 221224312011 is 110213422122.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 221224312011 - 2¹ = 221224312009 is a prime.

It is not an unprimeable number, because it can be changed into a prime (221224316011) 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, 146894541 + ... + 146896046.

It is an arithmetic number, because the mean of its divisors is an integer number (37017614088).

Almost surely, 2^221224312011 is an apocalyptic number.

221224312011 is a deficient number, since it is larger than the sum of its proper divisors (74916600693).

221224312011 is a wasteful number, since it uses less digits than its factorization.

221224312011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293790841.

The product of its (nonzero) digits is 384, while the sum is 21.

Adding to 221224312011 its reverse (110213422122), we get a palindrome (331437734133).

The spelling of 221224312011 in words is "two hundred twenty-one billion, two hundred twenty-four million, three hundred twelve thousand, eleven".