212211210002220 has 144 divisors (see below), whose sum is σ = 756243584826912. Its totient is φ = 47487823211520.

The previous prime is 212211210002201. The next prime is 212211210002243. The reversal of 212211210002220 is 22200012112212.

It is a happy number.

212211210002220 is a `hidden beast` number, since 21 + 2 + 211 + 210 + 0 + 0 + 2 + 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 = 212211210002193 and 212211210002202.

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, 4122181137 + ... + 4122232616.

It is an arithmetic number, because the mean of its divisors is an integer number (5251691561298).

Almost surely, 2^{212211210002220} is an apocalyptic number.

212211210002220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212211210002220 is an abundant number, since it is smaller than the sum of its proper divisors (544032374824692).

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

212211210002220 is a wasteful number, since it uses less digits than its factorization.

212211210002220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8244413792 (or 8244413787 counting only the distinct ones).

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

Adding to 212211210002220 its reverse (22200012112212), we get a palindrome (234411222114432).

The spelling of 212211210002220 in words is "two hundred twelve trillion, two hundred eleven billion, two hundred ten million, two thousand, two hundred twenty".