221221233113312 has 24 divisors (see below), whose sum is σ = 446151968613792. Its totient is φ = 107912796640000.

The previous prime is 221221233113269. The next prime is 221221233113323. The reversal of 221221233113312 is 213311332122122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 84306871064 + ... + 84306873687.

It is an arithmetic number, because the mean of its divisors is an integer number (18589665358908).

Almost surely, 2^{221221233113312} is an apocalyptic number.

It is an amenable number.

221221233113312 is an abundant number, since it is smaller than the sum of its proper divisors (224930735500480).

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

221221233113312 is a wasteful number, since it uses less digits than its factorization.

221221233113312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168613744802 (or 168613744794 counting only the distinct ones).

The product of its digits is 5184, while the sum is 29.

Adding to 221221233113312 its reverse (213311332122122), we get a palindrome (434532565235434).

The spelling of 221221233113312 in words is "two hundred twenty-one trillion, two hundred twenty-one billion, two hundred thirty-three million, one hundred thirteen thousand, three hundred twelve".