221342115644 has 12 divisors (see below), whose sum is σ = 417144756504. Its totient is φ = 102157899504.

The previous prime is 221342115641. The next prime is 221342115661. The reversal of 221342115644 is 446511243122.

It is a happy number.

It is a super-3 number, since 3×221342115644³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221342115641) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2128289522 + ... + 2128289625.

It is an arithmetic number, because the mean of its divisors is an integer number (34762063042).

Almost surely, 2^221342115644 is an apocalyptic number.

It is an amenable number.

221342115644 is a deficient number, since it is larger than the sum of its proper divisors (195802640860).

221342115644 is a wasteful number, since it uses less digits than its factorization.

221342115644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4256579164 (or 4256579162 counting only the distinct ones).

The product of its digits is 46080, while the sum is 35.

Adding to 221342115644 its reverse (446511243122), we get a palindrome (667853358766).

The spelling of 221342115644 in words is "two hundred twenty-one billion, three hundred forty-two million, one hundred fifteen thousand, six hundred forty-four".