212100022021220 has 192 divisors, whose sum is σ = 457656308928000. Its totient is φ = 82545510727680.

The previous prime is 212100022021219. The next prime is 212100022021247. The reversal of 212100022021220 is 22120220001212.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 104534263166 + ... + 104534265194.

It is an arithmetic number, because the mean of its divisors is an integer number (2383626609000).

Almost surely, 2^{212100022021220} is an apocalyptic number.

212100022021220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212100022021220 is an abundant number, since it is smaller than the sum of its proper divisors (245556286906780).

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

212100022021220 is a wasteful number, since it uses less digits than its factorization.

212100022021220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4518 (or 4516 counting only the distinct ones).

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

Adding to 212100022021220 its reverse (22120220001212), we get a palindrome (234220242022432).

The spelling of 212100022021220 in words is "two hundred twelve trillion, one hundred billion, twenty-two million, twenty-one thousand, two hundred twenty".