221212314343132 has 192 divisors, whose sum is σ = 457581043535616. Its totient is φ = 91607122575360.

The previous prime is 221212314343123. The next prime is 221212314343157. The reversal of 221212314343132 is 231343413212122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 63989675548 + ... + 63989679004.

It is an arithmetic number, because the mean of its divisors is an integer number (2383234601748).

Almost surely, 2^{221212314343132} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221212314343132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (228790521767808).

221212314343132 is an abundant number, since it is smaller than the sum of its proper divisors (236368729192484).

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

221212314343132 is a wasteful number, since it uses less digits than its factorization.

221212314343132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4896 (or 4894 counting only the distinct ones).

The product of its digits is 41472, while the sum is 34.

Adding to 221212314343132 its reverse (231343413212122), we get a palindrome (452555727555254).

The spelling of 221212314343132 in words is "two hundred twenty-one trillion, two hundred twelve billion, three hundred fourteen million, three hundred forty-three thousand, one hundred thirty-two".