12920111 has 4 divisors (see below), whose sum is σ = 12967032. Its totient is φ = 12873192.

The previous prime is 12920093. The next prime is 12920177. The reversal of 12920111 is 11102921.

12920111 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 11102921 = 17 ⋅653113.

It is a cyclic number.

It is not a de Polignac number, because 12920111 - 2¹⁴ = 12903727 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12920111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12922111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23045 + ... + 23598.

It is an arithmetic number, because the mean of its divisors is an integer number (3241758).

Almost surely, 2^12920111 is an apocalyptic number.

12920111 is a deficient number, since it is larger than the sum of its proper divisors (46921).

12920111 is an equidigital number, since it uses as much as digits as its factorization.

12920111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46920.

The product of its (nonzero) digits is 36, while the sum is 17.

The square root of 12920111 is about 3594.4555916022. The cubic root of 12920111 is about 234.6508229105.

It can be divided in two parts, 12920 and 111, that added together give a palindrome (13031).

The spelling of 12920111 in words is "twelve million, nine hundred twenty thousand, one hundred eleven".