221221224331300 has 18 divisors (see below), whose sum is σ = 480050056799138. Its totient is φ = 88488489732480.

The previous prime is 221221224331297. The next prime is 221221224331319. The reversal of 221221224331300 is 3133422122122.

It is a happy number.

It can be written as a sum of positive squares in 3 ways, for example, as 1158774743296 + 220062449588004 = 1076464^2 + 14834502^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1106106121557 + ... + 1106106121756.

Almost surely, 2^{221221224331300} is an apocalyptic number.

221221224331300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221221224331300 is an abundant number, since it is smaller than the sum of its proper divisors (258828832467838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221221224331300 is a wasteful number, since it uses less digits than its factorization.

221221224331300 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212212243327 (or 2212212243320 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

Adding to 221221224331300 its reverse (3133422122122), we get a palindrome (224354646453422).

The spelling of 221221224331300 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred twenty-four million, three hundred thirty-one thousand, three hundred".