21333344121241 has 2 divisors, whose sum is σ = 21333344121242. Its totient is φ = 21333344121240.

The previous prime is 21333344121209. The next prime is 21333344121259. The reversal of 21333344121241 is 14212144333312.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20190454837641 + 1142889283600 = 4493379^2 + 1069060^2 .

It is a cyclic number.

It is not a de Polignac number, because 21333344121241 - 2⁵ = 21333344121209 is a prime.

It is a super-2 number, since 2×21333344121241² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21333344121197 and 21333344121206.

It is not a weakly prime, because it can be changed into another prime (21333344121041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10666672060620 + 10666672060621.

It is an arithmetic number, because the mean of its divisors is an integer number (10666672060621).

Almost surely, 2^{21333344121241} is an apocalyptic number.

It is an amenable number.

21333344121241 is a deficient number, since it is larger than the sum of its proper divisors (1).

21333344121241 is an equidigital number, since it uses as much as digits as its factorization.

21333344121241 is an evil number, because the sum of its binary digits is even.

The product of its digits is 41472, while the sum is 34.

Adding to 21333344121241 its reverse (14212144333312), we get a palindrome (35545488454553).

The spelling of 21333344121241 in words is "twenty-one trillion, three hundred thirty-three billion, three hundred forty-four million, one hundred twenty-one thousand, two hundred forty-one".