1213333221000 has 64 divisors (see below), whose sum is σ = 3785599658880. Its totient is φ = 323555524800.

The previous prime is 1213333220947. The next prime is 1213333221041. The reversal of 1213333221000 is 1223333121.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 202219204 + ... + 202225203.

It is an arithmetic number, because the mean of its divisors is an integer number (59149994670).

Almost surely, 2^{1213333221000} is an apocalyptic number.

1213333221000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213333221000 is an abundant number, since it is smaller than the sum of its proper divisors (2572266437880).

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

1213333221000 is a wasteful number, since it uses less digits than its factorization.

1213333221000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404444431 (or 404444417 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 21.

Adding to 1213333221000 its reverse (1223333121), we get a palindrome (1214556554121).

The spelling of 1213333221000 in words is "one trillion, two hundred thirteen billion, three hundred thirty-three million, two hundred twenty-one thousand".