40121155011 has 8 divisors (see below), whose sum is σ = 61136998144. Its totient is φ = 22926374280.

The previous prime is 40121155001. The next prime is 40121155013. The reversal of 40121155011 is 11055112104.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 40121155011 - 2¹⁷ = 40121023939 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (21), and also a Moran number because the ratio is a prime number: 1910531191 = 40121155011 / (4 + 0 + 1 + 2 + 1 + 1 + 5 + 5 + 0 + 1 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40121155013) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 955265575 + ... + 955265616.

It is an arithmetic number, because the mean of its divisors is an integer number (7642124768).

Almost surely, 2^40121155011 is an apocalyptic number.

40121155011 is a deficient number, since it is larger than the sum of its proper divisors (21015843133).

40121155011 is a wasteful number, since it uses less digits than its factorization.

40121155011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1910531201.

The product of its (nonzero) digits is 200, while the sum is 21.

Adding to 40121155011 its reverse (11055112104), we get a palindrome (51176267115).

The spelling of 40121155011 in words is "forty billion, one hundred twenty-one million, one hundred fifty-five thousand, eleven".