12040002155 has 4 divisors (see below), whose sum is σ = 14448002592. Its totient is φ = 9632001720.

The previous prime is 12040002133. The next prime is 12040002167. The reversal of 12040002155 is 55120004021.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-12040002155 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1204000211 + ... + 1204000220.

It is an arithmetic number, because the mean of its divisors is an integer number (3612000648).

Almost surely, 2^12040002155 is an apocalyptic number.

12040002155 is a deficient number, since it is larger than the sum of its proper divisors (2408000437).

12040002155 is an equidigital number, since it uses as much as digits as its factorization.

12040002155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408000436.

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 12040002155 its reverse (55120004021), we get a palindrome (67160006176).

The spelling of 12040002155 in words is "twelve billion, forty million, two thousand, one hundred fifty-five".