21433233113 has 2 divisors, whose sum is σ = 21433233114. Its totient is φ = 21433233112.

The previous prime is 21433233007. The next prime is 21433233179. The reversal of 21433233113 is 31133233412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16809641104 + 4623592009 = 129652^2 + 67997^2 .

It is a cyclic number.

It is not a de Polignac number, because 21433233113 - 2³⁰ = 20359491289 is a prime.

It is not a weakly prime, because it can be changed into another prime (21433230113) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10716616556 + 10716616557.

It is an arithmetic number, because the mean of its divisors is an integer number (10716616557).

Almost surely, 2^21433233113 is an apocalyptic number.

It is an amenable number.

21433233113 is a deficient number, since it is larger than the sum of its proper divisors (1).

21433233113 is an equidigital number, since it uses as much as digits as its factorization.

21433233113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3888, while the sum is 26.

Adding to 21433233113 its reverse (31133233412), we get a palindrome (52566466525).

The spelling of 21433233113 in words is "twenty-one billion, four hundred thirty-three million, two hundred thirty-three thousand, one hundred thirteen".