212001221304 has 96 divisors (see below), whose sum is σ = 605793427200. Its totient is φ = 66792237120.

The previous prime is 212001221281. The next prime is 212001221351. The reversal of 212001221304 is 403122100212.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 409827 + ... + 769389.

It is an arithmetic number, because the mean of its divisors is an integer number (6310348200).

Almost surely, 2^212001221304 is an apocalyptic number.

212001221304 is a gapful number since it is divisible by the number (24) 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 212001221304, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302896713600).

212001221304 is an abundant number, since it is smaller than the sum of its proper divisors (393792205896).

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

212001221304 is a wasteful number, since it uses less digits than its factorization.

212001221304 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360025 (or 360018 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 18.

Adding to 212001221304 its reverse (403122100212), we get a palindrome (615123321516).

The spelling of 212001221304 in words is "two hundred twelve billion, one million, two hundred twenty-one thousand, three hundred four".