133244311021 has 2 divisors, whose sum is σ = 133244311022. Its totient is φ = 133244311020.

The previous prime is 133244310973. The next prime is 133244311103. The reversal of 133244311021 is 120113442331.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102537005796 + 30707305225 = 320214^2 + 175235^2 .

It is a cyclic number.

It is not a de Polignac number, because 133244311021 - 2²¹ = 133242213869 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (133244311721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 66622155510 + 66622155511.

It is an arithmetic number, because the mean of its divisors is an integer number (66622155511).

Almost surely, 2^133244311021 is an apocalyptic number.

It is an amenable number.

133244311021 is a deficient number, since it is larger than the sum of its proper divisors (1).

133244311021 is an equidigital number, since it uses as much as digits as its factorization.

133244311021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1728, while the sum is 25.

Adding to 133244311021 its reverse (120113442331), we get a palindrome (253357753352).

The spelling of 133244311021 in words is "one hundred thirty-three billion, two hundred forty-four million, three hundred eleven thousand, twenty-one".