12177121 has 8 divisors (see below), whose sum is σ = 13535424. Its totient is φ = 10860720.

The previous prime is 12177103. The next prime is 12177131.

12177121 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 12177121 - 2¹³ = 12168929 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12177092 and 12177101.

It is not an unprimeable number, because it can be changed into a prime (12177101) 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, 9861 + ... + 11026.

It is an arithmetic number, because the mean of its divisors is an integer number (1691928).

Almost surely, 2^12177121 is an apocalyptic number.

12177121 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

12177121 is a deficient number, since it is larger than the sum of its proper divisors (1358303).

12177121 is a wasteful number, since it uses less digits than its factorization.

12177121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20951.

The product of its digits is 196, while the sum is 22.

The square root of 12177121 is about 3489.5731830698. The cubic root of 12177121 is about 230.0637567419.

It can be divided in two parts, 121771 and 21, that multiplied together give a triangular number (2557191 = T₂₂₆₁).

The spelling of 12177121 in words is "twelve million, one hundred seventy-seven thousand, one hundred twenty-one".