212233100220 has 72 divisors (see below), whose sum is σ = 648037222560. Its totient is φ = 56220681600.

The previous prime is 212233100207. The next prime is 212233100237. The reversal of 212233100220 is 22001332212.

212233100220 is a `hidden beast` number, since 212 + 233 + 1 + 0 + 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 = 212233100193 and 212233100202.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3877035 + ... + 3931394.

It is an arithmetic number, because the mean of its divisors is an integer number (9000516980).

Almost surely, 2^212233100220 is an apocalyptic number.

212233100220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212233100220 is an abundant number, since it is smaller than the sum of its proper divisors (435804122340).

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

212233100220 is a wasteful number, since it uses less digits than its factorization.

212233100220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7808595 (or 7808590 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

Adding to 212233100220 its reverse (22001332212), we get a palindrome (234234432432).

The spelling of 212233100220 in words is "two hundred twelve billion, two hundred thirty-three million, one hundred thousand, two hundred twenty".