201212221000000 has 1568 divisors, whose sum is σ = 626624584102656. Its totient is φ = 62539776000000.

The previous prime is 201212220999989. The next prime is 201212221000019. The reversal of 201212221000000 is 122212102.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 223 ways as a sum of consecutive naturals, for example, 384726999739 + ... + 384727000261.

Almost surely, 2^{201212221000000} is an apocalyptic number.

201212221000000 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 201212221000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313312292051328).

201212221000000 is an abundant number, since it is smaller than the sum of its proper divisors (425412363102656).

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

201212221000000 is an frugal number, since it uses more digits than its factorization.

201212221000000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 703 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 201212221000000 its reverse (122212102), we get a palindrome (201212343212102).

The spelling of 201212221000000 in words is "two hundred one trillion, two hundred twelve billion, two hundred twenty-one million", and thus it is an aban number.