12155311 has 12 divisors (see below), whose sum is σ = 14252656. Its totient is φ = 10154880.

The previous prime is 12155291. The next prime is 12155347. The reversal of 12155311 is 11355121.

It is not a de Polignac number, because 12155311 - 2⁵ = 12155279 is a prime.

It is a hoax number, since the sum of its digits (19) coincides with the sum of the digits of its distinct prime factors.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12155371) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11251 + ... + 12283.

Almost surely, 2^12155311 is an apocalyptic number.

12155311 is a deficient number, since it is larger than the sum of its proper divisors (2097345).

12155311 is an equidigital number, since it uses as much as digits as its factorization.

12155311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122 (or 1081 counting only the distinct ones).

The product of its digits is 150, while the sum is 19.

The square root of 12155311 is about 3486.4467585208. The cubic root of 12155311 is about 229.9263217060.

The spelling of 12155311 in words is "twelve million, one hundred fifty-five thousand, three hundred eleven".