1125555211 has 16 divisors (see below), whose sum is σ = 1245777408. Its totient is φ = 1008412000.

The previous prime is 1125555191. The next prime is 1125555217.

1125555211 is nontrivially palindromic in base 10.

It is a cyclic number.

It is not a de Polignac number, because 1125555211 - 2¹³ = 1125547019 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1125555211.

It is not an unprimeable number, because it can be changed into a prime (1125555217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 249966 + ... + 254428.

It is an arithmetic number, because the mean of its divisors is an integer number (77861088).

Almost surely, 2^1125555211 is an apocalyptic number.

1125555211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1125555211 is a deficient number, since it is larger than the sum of its proper divisors (120222197).

1125555211 is a wasteful number, since it uses less digits than its factorization.

1125555211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4802.

The product of its digits is 2500, while the sum is 28.

The square root of 1125555211 is about 33549.2952384994. The cubic root of 1125555211 is about 1040.2129775237.

It can be divided in two parts, 11255 and 55211, that added together give a palindrome (66466).

The spelling of 1125555211 in words is "one billion, one hundred twenty-five million, five hundred fifty-five thousand, two hundred eleven".