221422001223766 has 64 divisors (see below), whose sum is σ = 408249965721600. Its totient is φ = 87908137873920.

The previous prime is 221422001223751. The next prime is 221422001223791. The reversal of 221422001223766 is 667322100224122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 815865 + ... + 21059668.

It is an arithmetic number, because the mean of its divisors is an integer number (6378905714400).

Almost surely, 2^{221422001223766} is an apocalyptic number.

221422001223766 is a deficient number, since it is larger than the sum of its proper divisors (186827964497834).

221422001223766 is a wasteful number, since it uses less digits than its factorization.

221422001223766 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21876229.

The product of its (nonzero) digits is 193536, while the sum is 40.

Adding to 221422001223766 its reverse (667322100224122), we get a palindrome (888744101447888).

The spelling of 221422001223766 in words is "two hundred twenty-one trillion, four hundred twenty-two billion, one million, two hundred twenty-three thousand, seven hundred sixty-six".