212042210420 has 48 divisors (see below), whose sum is σ = 468911963520. Its totient is φ = 80384870016.

The previous prime is 212042210357. The next prime is 212042210509. The reversal of 212042210420 is 24012240212.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 212042210392 and 212042210401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2064362 + ... + 2164641.

It is an arithmetic number, because the mean of its divisors is an integer number (9768999240).

Almost surely, 2^212042210420 is an apocalyptic number.

212042210420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212042210420 is an abundant number, since it is smaller than the sum of its proper divisors (256869753100).

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

212042210420 is a wasteful number, since it uses less digits than its factorization.

212042210420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4229144 (or 4229142 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

Adding to 212042210420 its reverse (24012240212), we get a palindrome (236054450632).

The spelling of 212042210420 in words is "two hundred twelve billion, forty-two million, two hundred ten thousand, four hundred twenty".