212042140422 has 64 divisors (see below), whose sum is σ = 492196760064. Its totient is φ = 59643429120.

The previous prime is 212042140393. The next prime is 212042140439. The reversal of 212042140422 is 224041240212.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 212042140392 and 212042140401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4854922 + ... + 4898402.

It is an arithmetic number, because the mean of its divisors is an integer number (7690574376).

Almost surely, 2^212042140422 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212042140422, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (246098380032).

212042140422 is an abundant number, since it is smaller than the sum of its proper divisors (280154619642).

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

212042140422 is a wasteful number, since it uses less digits than its factorization.

212042140422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45293.

The product of its (nonzero) digits is 2048, while the sum is 24.

Adding to 212042140422 its reverse (224041240212), we get a palindrome (436083380634).

The spelling of 212042140422 in words is "two hundred twelve billion, forty-two million, one hundred forty thousand, four hundred twenty-two".