221693379266 has 8 divisors (see below), whose sum is σ = 332717808384. Its totient is φ = 110787443140.

The previous prime is 221693379241. The next prime is 221693379283. The reversal of 221693379266 is 662973396122.

221693379266 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

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

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 in 3 ways as a sum of consecutive naturals, for example, 29618570 + ... + 29626053.

It is an arithmetic number, because the mean of its divisors is an integer number (41589726048).

Almost surely, 2^221693379266 is an apocalyptic number.

221693379266 is a deficient number, since it is larger than the sum of its proper divisors (111024429118).

221693379266 is a wasteful number, since it uses less digits than its factorization.

221693379266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59246496.

The product of its digits is 8817984, while the sum is 56.

The spelling of 221693379266 in words is "two hundred twenty-one billion, six hundred ninety-three million, three hundred seventy-nine thousand, two hundred sixty-six".