42111212 has 48 divisors (see below), whose sum is σ = 87720192. Its totient is φ = 17436480.

The previous prime is 42111211. The next prime is 42111247. The reversal of 42111212 is 21211124.

It is a happy number.

It is a super-2 number, since 2×42111212² = 3546708352217888, which contains 22 as substring.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (42111211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47033 + ... + 47919.

It is an arithmetic number, because the mean of its divisors is an integer number (1827504).

Almost surely, 2^42111212 is an apocalyptic number.

It is an amenable number.

42111212 is an abundant number, since it is smaller than the sum of its proper divisors (45608980).

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

42111212 is a wasteful number, since it uses less digits than its factorization.

42111212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 998 (or 996 counting only the distinct ones).

The product of its digits is 32, while the sum is 14.

The square root of 42111212 is about 6489.3152181105. The cubic root of 42111212 is about 347.9092003386.

Adding to 42111212 its reverse (21211124), we get a palindrome (63322336).

It can be divided in two parts, 421112 and 12, that added together give a palindrome (421124).

The spelling of 42111212 in words is "forty-two million, one hundred eleven thousand, two hundred twelve".