221655700420312 has 16 divisors (see below), whose sum is σ = 418154158770840. Its totient is φ = 110147924748096.

The previous prime is 221655700420283. The next prime is 221655700420321. The reversal of 221655700420312 is 213024007556122.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84990681373 + ... + 84990683980.

Almost surely, 2^{221655700420312} is an apocalyptic number.

It is an amenable number.

221655700420312 is a deficient number, since it is larger than the sum of its proper divisors (196498458350528).

221655700420312 is a wasteful number, since it uses less digits than its factorization.

221655700420312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169981365522 (or 169981365518 counting only the distinct ones).

The product of its (nonzero) digits is 201600, while the sum is 40.

Adding to 221655700420312 its reverse (213024007556122), we get a palindrome (434679707976434).

The spelling of 221655700420312 in words is "two hundred twenty-one trillion, six hundred fifty-five billion, seven hundred million, four hundred twenty thousand, three hundred twelve".