212210212100220 has 144 divisors (see below), whose sum is σ = 644419211304960. Its totient is φ = 56526565296000.

The previous prime is 212210212100207. The next prime is 212210212100251. The reversal of 212210212100220 is 22001212012212.

It is a happy number.

212210212100220 is a `hidden beast` number, since 2 + 1 + 2 + 210 + 21 + 210 + 0 + 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 = 212210212100193 and 212210212100202.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 872313361 + ... + 872556599.

It is an arithmetic number, because the mean of its divisors is an integer number (4475133411840).

Almost surely, 2^{212210212100220} is an apocalyptic number.

212210212100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212210212100220 is an abundant number, since it is smaller than the sum of its proper divisors (432208999204740).

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

212210212100220 is a wasteful number, since it uses less digits than its factorization.

212210212100220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 248616 (or 248611 counting only the distinct ones).

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

Adding to 212210212100220 its reverse (22001212012212), we get a palindrome (234211424112432).

The spelling of 212210212100220 in words is "two hundred twelve trillion, two hundred ten billion, two hundred twelve million, one hundred thousand, two hundred twenty".