221364871268 has 6 divisors (see below), whose sum is σ = 387388524726. Its totient is φ = 110682435632.

The previous prime is 221364871249. The next prime is 221364871271. The reversal of 221364871268 is 862178463122.

221364871268 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 only one way, i.e., 210453397504 + 10911473764 = 458752^2 + 104458^2 .

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 as a sum of consecutive naturals, namely, 27670608905 + ... + 27670608912.

It is an arithmetic number, because the mean of its divisors is an integer number (64564754121).

Almost surely, 2^221364871268 is an apocalyptic number.

It is an amenable number.

221364871268 is a deficient number, since it is larger than the sum of its proper divisors (166023653458).

221364871268 is a wasteful number, since it uses less digits than its factorization.

221364871268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55341217821 (or 55341217819 counting only the distinct ones).

The product of its digits is 1548288, while the sum is 50.

The spelling of 221364871268 in words is "two hundred twenty-one billion, three hundred sixty-four million, eight hundred seventy-one thousand, two hundred sixty-eight".