125211311 has 4 divisors (see below), whose sum is σ = 131801400. Its totient is φ = 118621224.

The previous prime is 125211301. The next prime is 125211319. The reversal of 125211311 is 113112521.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-125211311 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 125211311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125211319) 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 3 ways as a sum of consecutive naturals, for example, 3295016 + ... + 3295053.

It is an arithmetic number, because the mean of its divisors is an integer number (32950350).

Almost surely, 2^125211311 is an apocalyptic number.

125211311 is a deficient number, since it is larger than the sum of its proper divisors (6590089).

125211311 is an equidigital number, since it uses as much as digits as its factorization.

125211311 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6590088.

The product of its digits is 60, while the sum is 17.

The square root of 125211311 is about 11189.7860122524. The cubic root of 125211311 is about 500.2815893851.

Adding to 125211311 its reverse (113112521), we get a palindrome (238323832).

The spelling of 125211311 in words is "one hundred twenty-five million, two hundred eleven thousand, three hundred eleven".