126010221 has 4 divisors (see below), whose sum is σ = 168013632. Its totient is φ = 84006812.

The previous prime is 126010219. The next prime is 126010229. The reversal of 126010221 is 122010621.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122010621 = 3 ⋅40670207.

It is a cyclic number.

It is not a de Polignac number, because 126010221 - 2¹ = 126010219 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 126010221.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126010229) 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, 21001701 + ... + 21001706.

It is an arithmetic number, because the mean of its divisors is an integer number (42003408).

Almost surely, 2^126010221 is an apocalyptic number.

It is an amenable number.

126010221 is a deficient number, since it is larger than the sum of its proper divisors (42003411).

126010221 is an equidigital number, since it uses as much as digits as its factorization.

126010221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42003410.

The product of its (nonzero) digits is 48, while the sum is 15.

The square root of 126010221 is about 11225.4274306148. The cubic root of 126010221 is about 501.3433489284.

Adding to 126010221 its reverse (122010621), we get a palindrome (248020842).

The spelling of 126010221 in words is "one hundred twenty-six million, ten thousand, two hundred twenty-one".