126216213 has 16 divisors (see below), whose sum is σ = 173177856. Its totient is φ = 81708480.

The previous prime is 126216193. The next prime is 126216239. The reversal of 126216213 is 312612621.

It is not a de Polignac number, because 126216213 - 2¹⁸ = 125954069 is a prime.

It is a super-2 number, since 2×126216213² = 31861064848122738, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126216253) 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, 85068 + ... + 86538.

It is an arithmetic number, because the mean of its divisors is an integer number (10823616).

Almost surely, 2^126216213 is an apocalyptic number.

It is an amenable number.

126216213 is a deficient number, since it is larger than the sum of its proper divisors (46961643).

126216213 is a wasteful number, since it uses less digits than its factorization.

126216213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2284.

The product of its digits is 864, while the sum is 24.

The square root of 126216213 is about 11234.5989247503. The cubic root of 126216213 is about 501.6163862932.

Adding to 126216213 its reverse (312612621), we get a palindrome (438828834).

The spelling of 126216213 in words is "one hundred twenty-six million, two hundred sixteen thousand, two hundred thirteen".