2102212220 has 12 divisors (see below), whose sum is σ = 4414645704. Its totient is φ = 840884880.

The previous prime is 2102212219. The next prime is 2102212223. The reversal of 2102212220 is 222122012.

It is a junction number, because it is equal to n+sod(n) for n = 2102212195 and 2102212204.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2102212223) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 52555286 + ... + 52555325.

It is an arithmetic number, because the mean of its divisors is an integer number (367887142).

Almost surely, 2^2102212220 is an apocalyptic number.

2102212220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2102212220 is an abundant number, since it is smaller than the sum of its proper divisors (2312433484).

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

2102212220 is a wasteful number, since it uses less digits than its factorization.

2102212220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105110620 (or 105110618 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 14.

The square root of 2102212220 is about 45849.8878951737. The cubic root of 2102212220 is about 1281.0286774720.

Adding to 2102212220 its reverse (222122012), we get a palindrome (2324334232).

The spelling of 2102212220 in words is "two billion, one hundred two million, two hundred twelve thousand, two hundred twenty".