212140343420 has 24 divisors (see below), whose sum is σ = 448746513264. Its totient is φ = 84236748416.

The previous prime is 212140343377. The next prime is 212140343491. The reversal of 212140343420 is 24343041212.

212140343420 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 212140343420.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38709002 + ... + 38714481.

It is an arithmetic number, because the mean of its divisors is an integer number (18697771386).

Almost surely, 2^212140343420 is an apocalyptic number.

212140343420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

212140343420 is an abundant number, since it is smaller than the sum of its proper divisors (236606169844).

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

212140343420 is a wasteful number, since it uses less digits than its factorization.

212140343420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77423629 (or 77423627 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 212140343420 its reverse (24343041212), we get a palindrome (236483384632).

The spelling of 212140343420 in words is "two hundred twelve billion, one hundred forty million, three hundred forty-three thousand, four hundred twenty".