212021220110220 has 96 divisors (see below), whose sum is σ = 661266515931840. Its totient is φ = 56397996979200.

The previous prime is 212021220110123. The next prime is 212021220110233. The reversal of 212021220110220 is 22011022120212.

It is a happy number.

212021220110220 is a `hidden beast` number, since 2 + 1 + 20 + 212 + 201 + 10 + 220 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 212021220110193 and 212021220110202.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 489349407 + ... + 489782486.

It is an arithmetic number, because the mean of its divisors is an integer number (6888192874290).

Almost surely, 2^{212021220110220} is an apocalyptic number.

212021220110220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212021220110220 is an abundant number, since it is smaller than the sum of its proper divisors (449245295821620).

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

212021220110220 is a wasteful number, since it uses less digits than its factorization.

212021220110220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 979132312 (or 979132304 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 212021220110220 its reverse (22011022120212), we get a palindrome (234032242230432).

The spelling of 212021220110220 in words is "two hundred twelve trillion, twenty-one billion, two hundred twenty million, one hundred ten thousand, two hundred twenty".