40041122121 has 160 divisors (see below), whose sum is σ = 83084601600. Its totient is φ = 18537361920.

The previous prime is 40041122111. The next prime is 40041122123. The reversal of 40041122121 is 12122114004.

40041122121 is a `hidden beast` number, since 40 + 0 + 411 + 2 + 212 + 1 = 666.

It is not a de Polignac number, because 40041122121 - 2¹⁰ = 40041121097 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40041122094 and 40041122103.

It is not an unprimeable number, because it can be changed into a prime (40041122123) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 2342835 + ... + 2359863.

It is an arithmetic number, because the mean of its divisors is an integer number (519278760).

Almost surely, 2^40041122121 is an apocalyptic number.

It is an amenable number.

40041122121 is an abundant number, since it is smaller than the sum of its proper divisors (43043479479).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40041122121 is a wasteful number, since it uses less digits than its factorization.

40041122121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17101 (or 17092 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 40041122121 its reverse (12122114004), we get a palindrome (52163236125).

The spelling of 40041122121 in words is "forty billion, forty-one million, one hundred twenty-two thousand, one hundred twenty-one".