40424120203123 has 4 divisors (see below), whose sum is σ = 40425160144248. Its totient is φ = 40423080262000.

The previous prime is 40424120203003. The next prime is 40424120203231. The reversal of 40424120203123 is 32130202142404.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40424120203123 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40424120203091 and 40424120203100.

It is not an unprimeable number, because it can be changed into a prime (40424120243123) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519912253 + ... + 519989998.

It is an arithmetic number, because the mean of its divisors is an integer number (10106290036062).

Almost surely, 2^{40424120203123} is an apocalyptic number.

40424120203123 is a deficient number, since it is larger than the sum of its proper divisors (1039941125).

40424120203123 is a wasteful number, since it uses less digits than its factorization.

40424120203123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1039941124.

The product of its (nonzero) digits is 9216, while the sum is 28.

Adding to 40424120203123 its reverse (32130202142404), we get a palindrome (72554322345527).

The spelling of 40424120203123 in words is "forty trillion, four hundred twenty-four billion, one hundred twenty million, two hundred three thousand, one hundred twenty-three".