212221011552 has 48 divisors (see below), whose sum is σ = 607723808832. Its totient is φ = 64309397120.

The previous prime is 212221011551. The next prime is 212221011557. The reversal of 212221011552 is 255110122212.

It is a tau number, because it is divible by the number of its divisors (48).

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 (212221011551) 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, 100482378 + ... + 100484489.

It is an arithmetic number, because the mean of its divisors is an integer number (12660912684).

Almost surely, 2^212221011552 is an apocalyptic number.

212221011552 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

212221011552 is an abundant number, since it is smaller than the sum of its proper divisors (395502797280).

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

212221011552 is a wasteful number, since it uses less digits than its factorization.

212221011552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200966891 (or 200966883 counting only the distinct ones).

The product of its (nonzero) digits is 800, while the sum is 24.

Adding to 212221011552 its reverse (255110122212), we get a palindrome (467331133764).

The spelling of 212221011552 in words is "two hundred twelve billion, two hundred twenty-one million, eleven thousand, five hundred fifty-two".