212102122220 has 48 divisors (see below), whose sum is σ = 446617281600. Its totient is φ = 84611992320.

The previous prime is 212102122187. The next prime is 212102122241. The reversal of 212102122220 is 22221201212.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15375086 + ... + 15388874.

It is an arithmetic number, because the mean of its divisors is an integer number (9304526700).

Almost surely, 2^212102122220 is an apocalyptic number.

212102122220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212102122220 is an abundant number, since it is smaller than the sum of its proper divisors (234515159380).

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

212102122220 is a wasteful number, since it uses less digits than its factorization.

212102122220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15818 (or 15816 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

Adding to 212102122220 its reverse (22221201212), we get a palindrome (234323323432).

The spelling of 212102122220 in words is "two hundred twelve billion, one hundred two million, one hundred twenty-two thousand, two hundred twenty".