221411640361424 has 80 divisors (see below), whose sum is σ = 440890702238160. Its totient is φ = 107687835340800.

The previous prime is 221411640361423. The next prime is 221411640361447. The reversal of 221411640361424 is 424163046114122.

It can be written as a sum of positive squares in 8 ways, for example, as 7137083227024 + 214274557134400 = 2671532^2 + 14638120^2 .

It is a super-2 number, since 2×221411640361424² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221411640361421) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17677622 + ... + 27483114.

It is an arithmetic number, because the mean of its divisors is an integer number (5511133777977).

Almost surely, 2^{221411640361424} is an apocalyptic number.

It is an amenable number.

221411640361424 is a deficient number, since it is larger than the sum of its proper divisors (219479061876736).

221411640361424 is a wasteful number, since it uses less digits than its factorization.

221411640361424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9805848 (or 9805842 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 41.

Adding to 221411640361424 its reverse (424163046114122), we get a palindrome (645574686475546).

The spelling of 221411640361424 in words is "two hundred twenty-one trillion, four hundred eleven billion, six hundred forty million, three hundred sixty-one thousand, four hundred twenty-four".