42210112212 has 72 divisors (see below), whose sum is σ = 110427349032. Its totient is φ = 13585305600.

The previous prime is 42210112201. The next prime is 42210112223. The reversal of 42210112212 is 21221101224.

42210112212 is a `hidden beast` number, since 422 + 10 + 11 + 221 + 2 = 666.

It is an interprime number because it is at equal distance from previous prime (42210112201) and next prime (42210112223).

It can be written as a sum of positive squares in 4 ways, for example, as 938564496 + 41271547716 = 30636^2 + 203154^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4239 + ... + 290582.

It is an arithmetic number, because the mean of its divisors is an integer number (1533713181).

Almost surely, 2^42210112212 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 42210112212, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55213674516).

42210112212 is an abundant number, since it is smaller than the sum of its proper divisors (68217236820).

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

42210112212 is a wasteful number, since it uses less digits than its factorization.

42210112212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294969 (or 294964 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 42210112212 its reverse (21221101224), we get a palindrome (63431213436).

The spelling of 42210112212 in words is "forty-two billion, two hundred ten million, one hundred twelve thousand, two hundred twelve".