40044013121 has 16 divisors (see below), whose sum is σ = 45869980800. Its totient is φ = 34244477568.

The previous prime is 40044013063. The next prime is 40044013123. The reversal of 40044013121 is 12131044004.

It is not a de Polignac number, because 40044013121 - 2¹⁰ = 40044012097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40044013093 and 40044013102.

It is not an unprimeable number, because it can be changed into a prime (40044013123) 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, 9829541 + ... + 9833613.

It is an arithmetic number, because the mean of its divisors is an integer number (2866873800).

Almost surely, 2^40044013121 is an apocalyptic number.

It is an amenable number.

40044013121 is a deficient number, since it is larger than the sum of its proper divisors (5825967679).

40044013121 is a wasteful number, since it uses less digits than its factorization.

40044013121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6968.

The product of its (nonzero) digits is 384, while the sum is 20.

Adding to 40044013121 its reverse (12131044004), we get a palindrome (52175057125).

The spelling of 40044013121 in words is "forty billion, forty-four million, thirteen thousand, one hundred twenty-one".