212123122220000 has 120 divisors (see below), whose sum is σ = 521965470483072. Its totient is φ = 84831238400000.

The previous prime is 212123122219993. The next prime is 212123122220017. The reversal of 212123122220000 is 22221321212.

It is a super-2 number, since 2×212123122220000² (a number of 29 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 93296705 + ... + 95543295.

Almost surely, 2^{212123122220000} is an apocalyptic number.

212123122220000 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 212123122220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (260982735241536).

212123122220000 is an abundant number, since it is smaller than the sum of its proper divisors (309842348263072).

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

212123122220000 is an equidigital number, since it uses as much as digits as its factorization.

212123122220000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2251342 (or 2251319 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 212123122220000 its reverse (22221321212), we get a palindrome (212145343541212).

The spelling of 212123122220000 in words is "two hundred twelve trillion, one hundred twenty-three billion, one hundred twenty-two million, two hundred twenty thousand".