212102222220 has 144 divisors (see below), whose sum is σ = 767608138080. Its totient is φ = 48480501888.

The previous prime is 212102222209. The next prime is 212102222231. The reversal of 212102222220 is 22222201212.

212102222220 is a `hidden beast` number, since 212 + 10 + 2 + 222 + 220 = 666.

It is an interprime number because it is at equal distance from previous prime (212102222209) and next prime (212102222231).

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 = 212102222193 and 212102222202.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3981519 + ... + 4034438.

It is an arithmetic number, because the mean of its divisors is an integer number (5330612070).

Almost surely, 2^212102222220 is an apocalyptic number.

212102222220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212102222220 is an abundant number, since it is smaller than the sum of its proper divisors (555505915860).

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

212102222220 is a wasteful number, since it uses less digits than its factorization.

212102222220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8015989 (or 8015974 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

Adding to 212102222220 its reverse (22222201212), we get a palindrome (234324423432).

The spelling of 212102222220 in words is "two hundred twelve billion, one hundred two million, two hundred twenty-two thousand, two hundred twenty".