221330133312 has 56 divisors (see below), whose sum is σ = 585998275296. Its totient is φ = 73726867968.

The previous prime is 221330133307. The next prime is 221330133313. The reversal of 221330133312 is 213331033122.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221330133313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103923 + ... + 673394.

It is an arithmetic number, because the mean of its divisors is an integer number (10464254916).

Almost surely, 2^221330133312 is an apocalyptic number.

It is an amenable number.

221330133312 is an abundant number, since it is smaller than the sum of its proper divisors (364668141984).

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

221330133312 is a wasteful number, since it uses less digits than its factorization.

221330133312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 778815 (or 778805 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 24.

Adding to 221330133312 its reverse (213331033122), we get a palindrome (434661166434).

The spelling of 221330133312 in words is "two hundred twenty-one billion, three hundred thirty million, one hundred thirty-three thousand, three hundred twelve".