126352533221 has 4 divisors (see below), whose sum is σ = 126727466892. Its totient is φ = 125977599552.

The previous prime is 126352533217. The next prime is 126352533227. The reversal of 126352533221 is 122335253621.

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

It can be written as a sum of positive squares in 2 ways, for example, as 56384877025 + 69967656196 = 237455^2 + 264514^2 .

It is a cyclic number.

It is not a de Polignac number, because 126352533221 - 2² = 126352533217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (126352533227) 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, 187466330 + ... + 187467003.

It is an arithmetic number, because the mean of its divisors is an integer number (31681866723).

Almost surely, 2^126352533221 is an apocalyptic number.

It is an amenable number.

126352533221 is a deficient number, since it is larger than the sum of its proper divisors (374933671).

126352533221 is an equidigital number, since it uses as much as digits as its factorization.

126352533221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374933670.

The product of its digits is 64800, while the sum is 35.

Adding to 126352533221 its reverse (122335253621), we get a palindrome (248687786842).

The spelling of 126352533221 in words is "one hundred twenty-six billion, three hundred fifty-two million, five hundred thirty-three thousand, two hundred twenty-one".