221404134331 has 8 divisors (see below), whose sum is σ = 224448316640. Its totient is φ = 218360256192.

The previous prime is 221404134299. The next prime is 221404134359. The reversal of 221404134331 is 133431404122.

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 221404134331 - 2⁵ = 221404134299 is a prime.

It is a super-2 number, since 2×221404134331² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 221404134331.

It is not an unprimeable number, because it can be changed into a prime (221404135331) 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, 1660285 + ... + 1788673.

It is an arithmetic number, because the mean of its divisors is an integer number (28056039580).

Almost surely, 2^221404134331 is an apocalyptic number.

221404134331 is a deficient number, since it is larger than the sum of its proper divisors (3044182309).

221404134331 is a wasteful number, since it uses less digits than its factorization.

221404134331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 152085.

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 221404134331 its reverse (133431404122), we get a palindrome (354835538453).

The spelling of 221404134331 in words is "two hundred twenty-one billion, four hundred four million, one hundred thirty-four thousand, three hundred thirty-one".