221240011424 has 24 divisors (see below), whose sum is σ = 441532938420. Its totient is φ = 109104662016.

The previous prime is 221240011417. The next prime is 221240011483. The reversal of 221240011424 is 424110042122.

It can be written as a sum of positive squares in 2 ways, for example, as 212428810000 + 8811201424 = 460900^2 + 93868^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 221240011424.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47352119 + ... + 47356790.

Almost surely, 2^221240011424 is an apocalyptic number.

It is an amenable number.

221240011424 is a deficient number, since it is larger than the sum of its proper divisors (220292926996).

221240011424 is an equidigital number, since it uses as much as digits as its factorization.

221240011424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 94708992 (or 94708984 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 23.

Adding to 221240011424 its reverse (424110042122), we get a palindrome (645350053546).

The spelling of 221240011424 in words is "two hundred twenty-one billion, two hundred forty million, eleven thousand, four hundred twenty-four".