1211055223 has 8 divisors (see below), whose sum is σ = 1384600448. Its totient is φ = 1037644344.

The previous prime is 1211055191. The next prime is 1211055259. The reversal of 1211055223 is 3225501121.

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 1211055223 - 2⁵ = 1211055191 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1211055194 and 1211055203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1211055323) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13461 + ... + 51022.

It is an arithmetic number, because the mean of its divisors is an integer number (173075056).

Almost surely, 2^1211055223 is an apocalyptic number.

1211055223 is a deficient number, since it is larger than the sum of its proper divisors (173545225).

1211055223 is an equidigital number, since it uses as much as digits as its factorization.

1211055223 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67173.

The product of its (nonzero) digits is 600, while the sum is 22.

The square root of 1211055223 is about 34800.2187205770. The cubic root of 1211055223 is about 1065.9119120492.

Adding to 1211055223 its reverse (3225501121), we get a palindrome (4436556344).

The spelling of 1211055223 in words is "one billion, two hundred eleven million, fifty-five thousand, two hundred twenty-three".