12155011 has 8 divisors (see below), whose sum is σ = 13442544. Its totient is φ = 10897920.

The previous prime is 12154993. The next prime is 12155021. The reversal of 12155011 is 11055121.

12155011 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 12155011 - 2⁵ = 12154979 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12155021) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6766 + ... + 8371.

It is an arithmetic number, because the mean of its divisors is an integer number (1680318).

Almost surely, 2^12155011 is an apocalyptic number.

12155011 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12155011 is a deficient number, since it is larger than the sum of its proper divisors (1287533).

12155011 is a wasteful number, since it uses less digits than its factorization.

12155011 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15221.

The product of its (nonzero) digits is 50, while the sum is 16.

The square root of 12155011 is about 3486.4037345092. The cubic root of 12155011 is about 229.9244301196.

It can be divided in two parts, 1215 and 5011, that added together give a palindrome (6226).

The spelling of 12155011 in words is "twelve million, one hundred fifty-five thousand, eleven".