21433440101 has 2 divisors, whose sum is σ = 21433440102. Its totient is φ = 21433440100.

The previous prime is 21433440079. The next prime is 21433440109. The reversal of 21433440101 is 10104433412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18210153025 + 3223287076 = 134945^2 + 56774^2 .

It is a cyclic number.

It is not a de Polignac number, because 21433440101 - 2¹⁴ = 21433423717 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21433440109) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716720050 + 10716720051.

It is an arithmetic number, because the mean of its divisors is an integer number (10716720051).

Almost surely, 2^21433440101 is an apocalyptic number.

It is an amenable number.

21433440101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433440101 is an equidigital number, since it uses as much as digits as its factorization.

21433440101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1152, while the sum is 23.

Adding to 21433440101 its reverse (10104433412), we get a palindrome (31537873513).

The spelling of 21433440101 in words is "twenty-one billion, four hundred thirty-three million, four hundred forty thousand, one hundred one".