126221135 has 12 divisors (see below), whose sum is σ = 153234408. Its totient is φ = 99811008.

The previous prime is 126221131. The next prime is 126221149. The reversal of 126221135 is 531122621.

It is not a de Polignac number, because 126221135 - 2² = 126221131 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 126221135.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126221131) 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, 38012 + ... + 41198.

It is an arithmetic number, because the mean of its divisors is an integer number (12769534).

Almost surely, 2^126221135 is an apocalyptic number.

126221135 is a deficient number, since it is larger than the sum of its proper divisors (27013273).

126221135 is an frugal number, since it uses more digits than its factorization.

126221135 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3370 (or 3281 counting only the distinct ones).

The product of its digits is 720, while the sum is 23.

The square root of 126221135 is about 11234.8179780538. The cubic root of 126221135 is about 501.6229066487.

Adding to 126221135 its reverse (531122621), we get a palindrome (657343756).

The spelling of 126221135 in words is "one hundred twenty-six million, two hundred twenty-one thousand, one hundred thirty-five".