42121101423 has 16 divisors (see below), whose sum is σ = 56766542336. Its totient is φ = 27778464000.

The previous prime is 42121101413. The next prime is 42121101431. The reversal of 42121101423 is 32410112124.

42121101423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 42121101423 - 2⁸ = 42121101167 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 42121101423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42121101413) 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, 622890 + ... + 687192.

It is an arithmetic number, because the mean of its divisors is an integer number (3547908896).

Almost surely, 2^42121101423 is an apocalyptic number.

42121101423 is a deficient number, since it is larger than the sum of its proper divisors (14645440913).

42121101423 is a wasteful number, since it uses less digits than its factorization.

42121101423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66654.

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

Adding to 42121101423 its reverse (32410112124), we get a palindrome (74531213547).

The spelling of 42121101423 in words is "forty-two billion, one hundred twenty-one million, one hundred one thousand, four hundred twenty-three".