212121022102220 has 96 divisors (see below), whose sum is σ = 557817974300160. Its totient is φ = 65824384803840.

The previous prime is 212121022102201. The next prime is 212121022102259. The reversal of 212121022102220 is 22201220121212.

212121022102220 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×212121022102220³ (a number of 44 digits) contains 333 as substring.

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

It is a junction number, because it is equal to n+sod(n) for n = 212121022102192 and 212121022102201.

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, 303044525 + ... + 303743684.

It is an arithmetic number, because the mean of its divisors is an integer number (5810603898960).

Almost surely, 2^{212121022102220} is an apocalyptic number.

212121022102220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212121022102220 is an abundant number, since it is smaller than the sum of its proper divisors (345696952197940).

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

212121022102220 is a wasteful number, since it uses less digits than its factorization.

212121022102220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 606788463 (or 606788461 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 20.

Adding to 212121022102220 its reverse (22201220121212), we get a palindrome (234322242223432).

The spelling of 212121022102220 in words is "two hundred twelve trillion, one hundred twenty-one billion, twenty-two million, one hundred two thousand, two hundred twenty".