221032402144 has 24 divisors (see below), whose sum is σ = 435232435680. Its totient is φ = 110497180416.

The previous prime is 221032402121. The next prime is 221032402181. The reversal of 221032402144 is 441204230122.

It is a congruent number.

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, 404629 + ... + 778324.

It is an arithmetic number, because the mean of its divisors is an integer number (18134684820).

Almost surely, 2^221032402144 is an apocalyptic number.

It is an amenable number.

221032402144 is a deficient number, since it is larger than the sum of its proper divisors (214200033536).

221032402144 is a wasteful number, since it uses less digits than its factorization.

221032402144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188802 (or 1188794 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 25.

Adding to 221032402144 its reverse (441204230122), we get a palindrome (662236632266).

The spelling of 221032402144 in words is "two hundred twenty-one billion, thirty-two million, four hundred two thousand, one hundred forty-four".