21113242333 has 2 divisors, whose sum is σ = 21113242334. Its totient is φ = 21113242332.

The previous prime is 21113242313. The next prime is 21113242351. The reversal of 21113242333 is 33324231112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20781528964 + 331713369 = 144158^2 + 18213^2 .

It is a cyclic number.

It is not a de Polignac number, because 21113242333 - 2²⁵ = 21079687901 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 21113242298 and 21113242307.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21113242313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10556621166 + 10556621167.

It is an arithmetic number, because the mean of its divisors is an integer number (10556621167).

Almost surely, 2^21113242333 is an apocalyptic number.

It is an amenable number.

21113242333 is a deficient number, since it is larger than the sum of its proper divisors (1).

21113242333 is an equidigital number, since it uses as much as digits as its factorization.

21113242333 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2592, while the sum is 25.

Adding to 21113242333 its reverse (33324231112), we get a palindrome (54437473445).

The spelling of 21113242333 in words is "twenty-one billion, one hundred thirteen million, two hundred forty-two thousand, three hundred thirty-three".