221421203572354 has 8 divisors (see below), whose sum is σ = 332259992091648. Its totient is φ = 110667872875140.

The previous prime is 221421203572343. The next prime is 221421203572421. The reversal of 221421203572354 is 453275302124122.

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

It is a self number, because there is not a number n which added to its sum of digits gives 221421203572354.

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, 21364449042 + ... + 21364459405.

It is an arithmetic number, because the mean of its divisors is an integer number (41532499011456).

Almost surely, 2^{221421203572354} is an apocalyptic number.

221421203572354 is a deficient number, since it is larger than the sum of its proper divisors (110838788519294).

221421203572354 is a wasteful number, since it uses less digits than its factorization.

221421203572354 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42728911040.

The product of its (nonzero) digits is 806400, while the sum is 43.

Adding to 221421203572354 its reverse (453275302124122), we get a palindrome (674696505696476).

The spelling of 221421203572354 in words is "two hundred twenty-one trillion, four hundred twenty-one billion, two hundred three million, five hundred seventy-two thousand, three hundred fifty-four".