42121252430 has 16 divisors (see below), whose sum is σ = 77581470384. Its totient is φ = 16456675200.

The previous prime is 42121252343. The next prime is 42121252441. The reversal of 42121252430 is 3425212124.

It is a self number, because there is not a number n which added to its sum of digits gives 42121252430.

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, 48977771 + ... + 48978630.

It is an arithmetic number, because the mean of its divisors is an integer number (4848841899).

Almost surely, 2^42121252430 is an apocalyptic number.

42121252430 is a deficient number, since it is larger than the sum of its proper divisors (35460217954).

42121252430 is a wasteful number, since it uses less digits than its factorization.

42121252430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97956451.

The product of its (nonzero) digits is 3840, while the sum is 26.

Adding to 42121252430 its reverse (3425212124), we get a palindrome (45546464554).

The spelling of 42121252430 in words is "forty-two billion, one hundred twenty-one million, two hundred fifty-two thousand, four hundred thirty".