42121124340 has 48 divisors (see below), whose sum is σ = 119264322240. Its totient is φ = 11106092800.

The previous prime is 42121124329. The next prime is 42121124341. The reversal of 42121124340 is 4342112124.

It is a self number, because there is not a number n which added to its sum of digits gives 42121124340.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121124341) 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, 3938586 + ... + 3949265.

It is an arithmetic number, because the mean of its divisors is an integer number (2484673380).

Almost surely, 2^42121124340 is an apocalyptic number.

It is an amenable number.

42121124340 is an abundant number, since it is smaller than the sum of its proper divisors (77143197900).

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

42121124340 is a wasteful number, since it uses less digits than its factorization.

42121124340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7887952 (or 7887950 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 42121124340 its reverse (4342112124), we get a palindrome (46463236464).

The spelling of 42121124340 in words is "forty-two billion, one hundred twenty-one million, one hundred twenty-four thousand, three hundred forty".