42111220 has 24 divisors (see below), whose sum is σ = 93088800. Its totient is φ = 15957792.

The previous prime is 42111211. The next prime is 42111247. The reversal of 42111220 is 2211124.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 42111220.

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, 55030 + ... + 55789.

It is an arithmetic number, because the mean of its divisors is an integer number (3878700).

Almost surely, 2^42111220 is an apocalyptic number.

It is an amenable number.

42111220 is an abundant number, since it is smaller than the sum of its proper divisors (50977580).

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

42111220 is a wasteful number, since it uses less digits than its factorization.

42111220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110847 (or 110845 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 13.

The square root of 42111220 is about 6489.3158345083. The cubic root of 42111220 is about 347.9092223697.

Adding to 42111220 its reverse (2211124), we get a palindrome (44322344).

The spelling of 42111220 in words is "forty-two million, one hundred eleven thousand, two hundred twenty".