12211087 has 4 divisors (see below), whose sum is σ = 13955536. Its totient is φ = 10466640.

The previous prime is 12211079. The next prime is 12211103. The reversal of 12211087 is 78011221.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 78011221 = 31 ⋅2516491.

It is a cyclic number.

It is not a de Polignac number, because 12211087 - 2³ = 12211079 is a prime.

It is a super-2 number, since 2×12211087² = 298221291443138, which contains 22 as substring.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12211057) 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, 872214 + ... + 872227.

It is an arithmetic number, because the mean of its divisors is an integer number (3488884).

Almost surely, 2^12211087 is an apocalyptic number.

12211087 is a deficient number, since it is larger than the sum of its proper divisors (1744449).

12211087 is an equidigital number, since it uses as much as digits as its factorization.

12211087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1744448.

The product of its (nonzero) digits is 224, while the sum is 22.

The square root of 12211087 is about 3494.4365783342. The cubic root of 12211087 is about 230.2774660198.

The spelling of 12211087 in words is "twelve million, two hundred eleven thousand, eighty-seven".