1211064055 has 4 divisors (see below), whose sum is σ = 1453276872. Its totient is φ = 968851240.

The previous prime is 1211064013. The next prime is 1211064077. The reversal of 1211064055 is 5504601121.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5504601121 = 16567 ⋅332263.

It is not a de Polignac number, because 1211064055 - 2¹¹ = 1211062007 is a prime.

It is a super-2 number, since 2×1211064055² = 2933352290626086050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 121106401 + ... + 121106410.

It is an arithmetic number, because the mean of its divisors is an integer number (363319218).

Almost surely, 2^1211064055 is an apocalyptic number.

1211064055 is a deficient number, since it is larger than the sum of its proper divisors (242212817).

1211064055 is an equidigital number, since it uses as much as digits as its factorization.

1211064055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 242212816.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 1211064055 is about 34800.3456160998. The cubic root of 1211064055 is about 1065.9145032086.

Adding to 1211064055 its reverse (5504601121), we get a palindrome (6715665176).

The spelling of 1211064055 in words is "one billion, two hundred eleven million, sixty-four thousand, fifty-five".