42121424340 has 72 divisors (see below), whose sum is σ = 127837775520. Its totient is φ = 11226273984.

The previous prime is 42121424329. The next prime is 42121424363. The reversal of 42121424340 is 4342412124.

42121424340 is a `hidden beast` number, since 4 + 212 + 14 + 2 + 434 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 273391 + ... + 398729.

It is an arithmetic number, because the mean of its divisors is an integer number (1775524660).

Almost surely, 2^42121424340 is an apocalyptic number.

It is an amenable number.

42121424340 is an abundant number, since it is smaller than the sum of its proper divisors (85716351180).

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

42121424340 is a wasteful number, since it uses less digits than its factorization.

42121424340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127221 (or 127216 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 27.

Adding to 42121424340 its reverse (4342412124), we get a palindrome (46463836464).

The spelling of 42121424340 in words is "forty-two billion, one hundred twenty-one million, four hundred twenty-four thousand, three hundred forty".