12261226333021 has 2 divisors, whose sum is σ = 12261226333022. Its totient is φ = 12261226333020.

The previous prime is 12261226332989. The next prime is 12261226333129. The reversal of 12261226333021 is 12033362216221.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7183933041796 + 5077293291225 = 2680286^2 + 2253285^2 .

It is a cyclic number.

It is not a de Polignac number, because 12261226333021 - 2⁵ = 12261226332989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12261226333621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6130613166510 + 6130613166511.

It is an arithmetic number, because the mean of its divisors is an integer number (6130613166511).

Almost surely, 2^{12261226333021} is an apocalyptic number.

It is an amenable number.

12261226333021 is a deficient number, since it is larger than the sum of its proper divisors (1).

12261226333021 is an equidigital number, since it uses as much as digits as its factorization.

12261226333021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 34.

Adding to 12261226333021 its reverse (12033362216221), we get a palindrome (24294588549242).

The spelling of 12261226333021 in words is "twelve trillion, two hundred sixty-one billion, two hundred twenty-six million, three hundred thirty-three thousand, twenty-one".