212122220000 has 240 divisors, whose sum is σ = 530938945152. Its totient is φ = 83385600000.

The previous prime is 212122219867. The next prime is 212122220021. The reversal of 212122220000 is 22221212.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 349459697 + ... + 349460303.

Almost surely, 2^212122220000 is an apocalyptic number.

212122220000 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 212122220000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265469472576).

212122220000 is an abundant number, since it is smaller than the sum of its proper divisors (318816725152).

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

212122220000 is a wasteful number, since it uses less digits than its factorization.

212122220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911 (or 888 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

Adding to 212122220000 its reverse (22221212), we get a palindrome (212144441212).

The spelling of 212122220000 in words is "two hundred twelve billion, one hundred twenty-two million, two hundred twenty thousand".