221423221396 has 24 divisors (see below), whose sum is σ = 421986355560. Its totient is φ = 101047068672.

The previous prime is 221423221379. The next prime is 221423221417. The reversal of 221423221396 is 693122324122.

It can be written as a sum of positive squares in 4 ways, for example, as 20459297296 + 200963924100 = 143036^2 + 448290^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23917501 + ... + 23926756.

It is an arithmetic number, because the mean of its divisors is an integer number (17582764815).

Almost surely, 2^221423221396 is an apocalyptic number.

221423221396 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

221423221396 is a deficient number, since it is larger than the sum of its proper divisors (200563134164).

221423221396 is a wasteful number, since it uses less digits than its factorization.

221423221396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47844363 (or 47844361 counting only the distinct ones).

The product of its digits is 62208, while the sum is 37.

The spelling of 221423221396 in words is "two hundred twenty-one billion, four hundred twenty-three million, two hundred twenty-one thousand, three hundred ninety-six".