221386408330 has 8 divisors (see below), whose sum is σ = 398495535012. Its totient is φ = 88554563328.

The previous prime is 221386408319. The next prime is 221386408339. The reversal of 221386408330 is 33804683122.

It can be written as a sum of positive squares in 2 ways, for example, as 184136250321 + 37250158009 = 429111^2 + 193003^2 .

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

It is not an unprimeable number, because it can be changed into a prime (221386408339) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11069320407 + ... + 11069320426.

Almost surely, 2^221386408330 is an apocalyptic number.

221386408330 is a deficient number, since it is larger than the sum of its proper divisors (177109126682).

221386408330 is a wasteful number, since it uses less digits than its factorization.

221386408330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22138640840.

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 221386408330 in words is "two hundred twenty-one billion, three hundred eighty-six million, four hundred eight thousand, three hundred thirty".