221404260842 has 16 divisors (see below), whose sum is σ = 333286763400. Its totient is φ = 110309326848.

The previous prime is 221404260821. The next prime is 221404260871. The reversal of 221404260842 is 248062404122.

It can be written as a sum of positive squares in 4 ways, for example, as 221079576481 + 324684361 = 470191^2 + 18019^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 516938 + ... + 842634.

Almost surely, 2^221404260842 is an apocalyptic number.

221404260842 is a deficient number, since it is larger than the sum of its proper divisors (111882502558).

221404260842 is a wasteful number, since it uses less digits than its factorization.

221404260842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326905.

The product of its (nonzero) digits is 49152, while the sum is 35.

Adding to 221404260842 its reverse (248062404122), we get a palindrome (469466664964).

The spelling of 221404260842 in words is "two hundred twenty-one billion, four hundred four million, two hundred sixty thousand, eight hundred forty-two".