126211231 has 4 divisors (see below), whose sum is σ = 126475200. Its totient is φ = 125947264.

The previous prime is 126211229. The next prime is 126211279. The reversal of 126211231 is 132112621.

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

It is a cyclic number.

It is not a de Polignac number, because 126211231 - 2¹ = 126211229 is a prime.

It is a super-2 number, since 2×126211231² = 31858549661070722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 126211199 and 126211208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126211291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131266 + ... + 132223.

It is an arithmetic number, because the mean of its divisors is an integer number (31618800).

Almost surely, 2^126211231 is an apocalyptic number.

126211231 is a deficient number, since it is larger than the sum of its proper divisors (263969).

126211231 is an equidigital number, since it uses as much as digits as its factorization.

126211231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263968.

The product of its digits is 144, while the sum is 19.

The square root of 126211231 is about 11234.3771968009. The cubic root of 126211231 is about 501.6097862808.

Adding to 126211231 its reverse (132112621), we get a palindrome (258323852).

The spelling of 126211231 in words is "one hundred twenty-six million, two hundred eleven thousand, two hundred thirty-one".