42121143420 has 48 divisors (see below), whose sum is σ = 119084259840. Its totient is φ = 11123251776.

The previous prime is 42121143413. The next prime is 42121143431. The reversal of 42121143420 is 2434112124.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3401680 + ... + 3414039.

It is an arithmetic number, because the mean of its divisors is an integer number (2480922080).

Almost surely, 2^42121143420 is an apocalyptic number.

It is an amenable number.

42121143420 is an abundant number, since it is smaller than the sum of its proper divisors (76963116420).

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

42121143420 is a wasteful number, since it uses less digits than its factorization.

42121143420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6815834 (or 6815832 counting only the distinct ones).

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

Adding to 42121143420 its reverse (2434112124), we get a palindrome (44555255544).

The spelling of 42121143420 in words is "forty-two billion, one hundred twenty-one million, one hundred forty-three thousand, four hundred twenty".