42112221123 has 16 divisors (see below), whose sum is σ = 64212374016. Its totient is φ = 24048612480.

The previous prime is 42112221119. The next prime is 42112221131. The reversal of 42112221123 is 32112221124.

It is a happy number.

It is not a de Polignac number, because 42112221123 - 2² = 42112221119 is a prime.

It is a super-2 number, since 2×42112221123² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 42112221123.

It is not an unprimeable number, because it can be changed into a prime (42112221133) 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, 613023 + ... + 678248.

It is an arithmetic number, because the mean of its divisors is an integer number (4013273376).

Almost surely, 2^42112221123 is an apocalyptic number.

42112221123 is a deficient number, since it is larger than the sum of its proper divisors (22100152893).

42112221123 is a wasteful number, since it uses less digits than its factorization.

42112221123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292834.

The product of its digits is 384, while the sum is 21.

Adding to 42112221123 its reverse (32112221124), we get a palindrome (74224442247).

Subtracting from 42112221123 its reverse (32112221124), we obtain a palindrome (9999999999).

The spelling of 42112221123 in words is "forty-two billion, one hundred twelve million, two hundred twenty-one thousand, one hundred twenty-three".