125512211 has 12 divisors (see below), whose sum is σ = 142414272. Its totient is φ = 110418000.

The previous prime is 125512201. The next prime is 125512213. The reversal of 125512211 is 112215521.

It is not a de Polignac number, because 125512211 - 2⁶ = 125512147 is a prime.

It is a super-2 number, since 2×125512211² = 31506630220217042, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (125512213) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12980 + ... + 20481.

It is an arithmetic number, because the mean of its divisors is an integer number (11867856).

Almost surely, 2^125512211 is an apocalyptic number.

125512211 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

125512211 is a deficient number, since it is larger than the sum of its proper divisors (16902061).

125512211 is a wasteful number, since it uses less digits than its factorization.

125512211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33514 (or 33503 counting only the distinct ones).

The product of its digits is 200, while the sum is 20.

The square root of 125512211 is about 11203.2232415497. The cubic root of 125512211 is about 500.6820172819.

Adding to 125512211 its reverse (112215521), we get a palindrome (237727732).

The spelling of 125512211 in words is "one hundred twenty-five million, five hundred twelve thousand, two hundred eleven".