40121120555 has 16 divisors (see below), whose sum is σ = 51695423424. Its totient is φ = 29783362560.

The previous prime is 40121120551. The next prime is 40121120563. The reversal of 40121120555 is 55502112104.

It is not a de Polignac number, because 40121120555 - 2² = 40121120551 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40121120551) 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, 3318002 + ... + 3330071.

It is an arithmetic number, because the mean of its divisors is an integer number (3230963964).

Almost surely, 2^40121120555 is an apocalyptic number.

40121120555 is a deficient number, since it is larger than the sum of its proper divisors (11574302869).

40121120555 is a wasteful number, since it uses less digits than its factorization.

40121120555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6648166.

The product of its (nonzero) digits is 2000, while the sum is 26.

Adding to 40121120555 its reverse (55502112104), we get a palindrome (95623232659).

The spelling of 40121120555 in words is "forty billion, one hundred twenty-one million, one hundred twenty thousand, five hundred fifty-five".