12901111 has 4 divisors (see below), whose sum is σ = 12910912. Its totient is φ = 12891312.

The previous prime is 12901103. The next prime is 12901127. The reversal of 12901111 is 11110921.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 12901111 - 2³ = 12901103 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12901711) 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, 2550 + ... + 5683.

It is an arithmetic number, because the mean of its divisors is an integer number (3227728).

Almost surely, 2^12901111 is an apocalyptic number.

12901111 is a deficient number, since it is larger than the sum of its proper divisors (9801).

12901111 is an equidigital number, since it uses as much as digits as its factorization.

12901111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9800.

The product of its (nonzero) digits is 18, while the sum is 16.

The square root of 12901111 is about 3591.8116598731. The cubic root of 12901111 is about 234.5357425556.

It can be divided in two parts, 1290 and 1111, that added together give a 4-th power (2401 = 7⁴).

The spelling of 12901111 in words is "twelve million, nine hundred one thousand, one hundred eleven".