212121022220000 has 480 divisors, whose sum is σ = 567361798907904. Its totient is φ = 77806713600000.

The previous prime is 212121022219979. The next prime is 212121022220047. The reversal of 212121022220000 is 22220121212.

It is a happy number.

It is a super-3 number, since 3×212121022220000³ (a number of 44 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1525750490 + ... + 1525889510.

Almost surely, 2^{212121022220000} is an apocalyptic number.

212121022220000 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 212121022220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (283680899453952).

212121022220000 is an abundant number, since it is smaller than the sum of its proper divisors (355240776687904).

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

212121022220000 is a wasteful number, since it uses less digits than its factorization.

212121022220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 139212 (or 139189 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212121022220000 its reverse (22220121212), we get a palindrome (212143242341212).

The spelling of 212121022220000 in words is "two hundred twelve trillion, one hundred twenty-one billion, twenty-two million, two hundred twenty thousand".