212221121300 has 144 divisors (see below), whose sum is σ = 510942297600. Its totient is φ = 76181414400.

The previous prime is 212221121293. The next prime is 212221121311. The reversal of 212221121300 is 3121122212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2883965 + ... + 2956635.

It is an arithmetic number, because the mean of its divisors is an integer number (3548210400).

Almost surely, 2^212221121300 is an apocalyptic number.

212221121300 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212221121300, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255471148800).

212221121300 is an abundant number, since it is smaller than the sum of its proper divisors (298721176300).

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

212221121300 is a wasteful number, since it uses less digits than its factorization.

212221121300 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72786 (or 72779 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 17.

Adding to 212221121300 its reverse (3121122212), we get a palindrome (215342243512).

The spelling of 212221121300 in words is "two hundred twelve billion, two hundred twenty-one million, one hundred twenty-one thousand, three hundred".