13040021155 has 16 divisors (see below), whose sum is σ = 18220883904. Its totient is φ = 8773015680.

The previous prime is 13040021147. The next prime is 13040021191. The reversal of 13040021155 is 55112004031.

It is a happy number.

It is not a de Polignac number, because 13040021155 - 2³ = 13040021147 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 3512976 + ... + 3516685.

It is an arithmetic number, because the mean of its divisors is an integer number (1138805244).

Almost surely, 2^13040021155 is an apocalyptic number.

13040021155 is a deficient number, since it is larger than the sum of its proper divisors (5180862749).

13040021155 is an equidigital number, since it uses as much as digits as its factorization.

13040021155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7029726.

The product of its (nonzero) digits is 600, while the sum is 22.

Adding to 13040021155 its reverse (55112004031), we get a palindrome (68152025186).

The spelling of 13040021155 in words is "thirteen billion, forty million, twenty-one thousand, one hundred fifty-five".