11821214 has 4 divisors (see below), whose sum is σ = 17731824. Its totient is φ = 5910606.

The previous prime is 11821177. The next prime is 11821223. The reversal of 11821214 is 41212811.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 41212811 = 17 ⋅2424283.

It is a super-2 number, since 2×11821214² = 279482200867592, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2955302 + ... + 2955305.

It is an arithmetic number, because the mean of its divisors is an integer number (4432956).

Almost surely, 2^11821214 is an apocalyptic number.

11821214 is a deficient number, since it is larger than the sum of its proper divisors (5910610).

11821214 is an equidigital number, since it uses as much as digits as its factorization.

11821214 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5910609.

The product of its digits is 128, while the sum is 20.

The square root of 11821214 is about 3438.1992379733. The cubic root of 11821214 is about 227.8001608956.

The spelling of 11821214 in words is "eleven million, eight hundred twenty-one thousand, two hundred fourteen".