221440233412 has 24 divisors (see below), whose sum is σ = 390240768960. Its totient is φ = 109943450400.

The previous prime is 221440233403. The next prime is 221440233419. The reversal of 221440233412 is 214332044122.

It is a super-2 number, since 2×221440233412² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (221440233419) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1486638 + ... + 1628794.

It is an arithmetic number, because the mean of its divisors is an integer number (16260032040).

Almost surely, 2^221440233412 is an apocalyptic number.

It is an amenable number.

221440233412 is a deficient number, since it is larger than the sum of its proper divisors (168800535548).

221440233412 is a wasteful number, since it uses less digits than its factorization.

221440233412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 144891 (or 144889 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 221440233412 its reverse (214332044122), we get a palindrome (435772277534).

The spelling of 221440233412 in words is "two hundred twenty-one billion, four hundred forty million, two hundred thirty-three thousand, four hundred twelve".