221440120402 has 8 divisors (see below), whose sum is σ = 332196230412. Its totient is φ = 110708043600.

The previous prime is 221440120357. The next prime is 221440120457. The reversal of 221440120402 is 204021044122.

221440120402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 144733832721 + 76706287681 = 380439^2 + 276959^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5985249 + ... + 6022132.

Almost surely, 2^221440120402 is an apocalyptic number.

221440120402 is a deficient number, since it is larger than the sum of its proper divisors (110756110010).

221440120402 is a wasteful number, since it uses less digits than its factorization.

221440120402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12016604.

The product of its (nonzero) digits is 1024, while the sum is 22.

Adding to 221440120402 its reverse (204021044122), we get a palindrome (425461164524).

The spelling of 221440120402 in words is "two hundred twenty-one billion, four hundred forty million, one hundred twenty thousand, four hundred two".