40424120203121 has 4 divisors (see below), whose sum is σ = 42802009626852. Its totient is φ = 38046230779392.

The previous prime is 40424120203003. The next prime is 40424120203231. The reversal of 40424120203121 is 12130202142404.

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

It can be written as a sum of positive squares in 2 ways, for example, as 27012301496896 + 13411818706225 = 5197336^2 + 3662215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40424120203121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40424120203921) 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, 1188944711840 + ... + 1188944711873.

It is an arithmetic number, because the mean of its divisors is an integer number (10700502406713).

Almost surely, 2^{40424120203121} is an apocalyptic number.

It is an amenable number.

40424120203121 is a deficient number, since it is larger than the sum of its proper divisors (2377889423731).

40424120203121 is a wasteful number, since it uses less digits than its factorization.

40424120203121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2377889423730.

The product of its (nonzero) digits is 3072, while the sum is 26.

Adding to 40424120203121 its reverse (12130202142404), we get a palindrome (52554322345525).

The spelling of 40424120203121 in words is "forty trillion, four hundred twenty-four billion, one hundred twenty million, two hundred three thousand, one hundred twenty-one".