40751221117 has 6 divisors (see below), whose sum is σ = 41453630078. Its totient is φ = 40060519032.

The previous prime is 40751221103. The next prime is 40751221123. The reversal of 40751221117 is 71112215704.

It can be written as a sum of positive squares in only one way, i.e., 34015900356 + 6735320761 = 184434^2 + 82069^2 .

It is not a de Polignac number, because 40751221117 - 2¹⁵ = 40751188349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40751221157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5849898 + ... + 5856859.

Almost surely, 2^40751221117 is an apocalyptic number.

It is an amenable number.

40751221117 is a deficient number, since it is larger than the sum of its proper divisors (702408961).

40751221117 is an equidigital number, since it uses as much as digits as its factorization.

40751221117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11706875 (or 11706816 counting only the distinct ones).

The product of its (nonzero) digits is 3920, while the sum is 31.

The spelling of 40751221117 in words is "forty billion, seven hundred fifty-one million, two hundred twenty-one thousand, one hundred seventeen".