42121112 has 32 divisors (see below), whose sum is σ = 86406480. Its totient is φ = 19090560.

The previous prime is 42121099. The next prime is 42121147. The reversal of 42121112 is 21112124.

It is a happy number.

It is a super-2 number, since 2×42121112² = 3548376152233088, which contains 22 as substring.

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

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, 57098 + ... + 57830.

Almost surely, 2^42121112 is an apocalyptic number.

It is an amenable number.

42121112 is an abundant number, since it is smaller than the sum of its proper divisors (44285368).

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

42121112 is a wasteful number, since it uses less digits than its factorization.

42121112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1403 (or 1399 counting only the distinct ones).

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

The square root of 42121112 is about 6490.0779656334. The cubic root of 42121112 is about 347.9364617340.

Adding to 42121112 its reverse (21112124), we get a palindrome (63233236).

The spelling of 42121112 in words is "forty-two million, one hundred twenty-one thousand, one hundred twelve".