212121212000 has 96 divisors (see below), whose sum is σ = 521798397120. Its totient is φ = 84748108800.

The previous prime is 212121211987. The next prime is 212121212021. The reversal of 212121212000 is 212121212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3397061 + ... + 3458939.

It is an arithmetic number, because the mean of its divisors is an integer number (5435399970).

Almost surely, 2^212121212000 is an apocalyptic number.

212121212000 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 212121212000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260899198560).

212121212000 is an abundant number, since it is smaller than the sum of its proper divisors (309677185120).

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

212121212000 is an equidigital number, since it uses as much as digits as its factorization.

212121212000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62761 (or 62743 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 14.

Adding to 212121212000 its reverse (212121212), we get a palindrome (212333333212).

212121212000 divided by its reverse (212121212) gives a cube (1000 = 10³).

The spelling of 212121212000 in words is "two hundred twelve billion, one hundred twenty-one million, two hundred twelve thousand".